COURT OF APPEALS

SECOND DISTRICT OF TEXAS

FORT WORTH

NO. 02-17-00168-CV

BNSF RAILWAY COMPANY

(INDIVIDUALLY AND AS

SUCCESSOR-IN-INTEREST TO 

THE BURLINGTON NORTHERN, 

INC., BURLINGTON NORTHERN & 

SANTA FE RAILWAY COMPANY 

AND ATCHISON TOPEKA AND 

SANTA FE RAILWAY COMPANY)

APPELLANT

V.

LEONARD A. BACA APPELLEE 

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FROM THE 48TH DISTRICT COURT OF TARRANT COUNTY

TRIAL COURT NO. 048-267301-13

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MEMORANDUM OPINION1

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1See Tex. R. App. P. 47.4.
2

In this permissive interlocutory appeal involving a claim under the Federal 

Employers Liability Act (FELA), Appellee Leonard A. Baca alleges that while 

working for Appellant BNSF’s predecessor in interest, he was exposed to 

asbestos, causing him to develop asbestosis. See 45 U.S.C.A. §§ 51–60 (West 

2007). Baca retained as an expert Dr. Alvin Schonfeld, a pulmonologist, who 

provided a report in which he concluded Baca’s asbestosis was causally related 

to his exposure to asbestos during his employment. BNSF moved to exclude Dr. 

Schonfeld’s causation opinion as inadmissible because it was unreliable under

well-established caselaw.2 The trial court denied the motion but also granted 

permission in its order for BNSF to immediately appeal, finding that the order 

involved a controlling question of law as to which there is a substantial ground for 

difference of opinion and an immediate appeal from the order would materially 

advance the ultimate termination of this litigation. See Tex. Civ. Prac. & Rem. 

Code § 51.014(d) (West 2017); Tex. R. Civ. P. 168. 

BNSF filed a petition for permissive appeal, which we granted. See BNSF 

Ry. Co. v. Baca, No. 02-17-00168-CV, 2017 WL 2570826, at *1 (Tex. App.—Fort 

Worth June 14, 2017, no pet.) (mem. op. & order). The controlling question of 

 

2

Included among the cases BNSF cited were Daubert v. Merrell Dow 

Pharms., Inc., 509 U.S. 579 (1993); Borg-Warner Corp. v. Flores, 232 S.W.3d 

765 (Tex. 2007); Merrell Dow Pharms., Inc. v. Havner, 953 S.W.2d 706 (Tex.

1997); and E.I. DuPont de Nemours & Co. v. Robinson, 923 S.W.2d 549 (Tex. 

1995). 
3

law the trial court identified and ruled upon in its order, and the sole issue in this 

appeal, is 

whether the Federal Employers Liability Act’s (45 U.S.C. §§ 51-60)

lower causation standard—i.e., whether a railroad’s negligence 

played any part, even the slightest, in bringing about the injury—

makes inapplicable the expert admissibility standards expressed in 

cases like E.I. DuPont de Nemours & Co. v. Robinson, 923 S.W.2d 

549 (Tex. 1995) and Merrell Dow Pharmaceuticals, Inc. v. Havner, 

953 S.W.2d 706 (Tex. 1997). 

We answer no. Because the trial court denied BNSF’s motion to exclude based 

on the opposite conclusion, we reverse the trial court’s order and remand this 

case for further proceedings. 

I. BACKGROUND FACTS3

FELA makes any railroad engaged in interstate commerce liable in 

damages for an injury to or death of an employee sustained while employed by 

the railroad if the injury or death resulted in whole or in part from the negligence 

of the railroad’s employees or by reason of any defect or insufficiency in its 

equipment due to its negligence. See 45 U.S.C.A. § 51; Union Pac. R.R. v. 

Williams, 85 S.W.3d 162, 165 (Tex. 2002). To prevail on a FELA claim, a plaintiff 

must establish the traditional common-law elements of negligence: duty, breach, 

 

3Baca has filed a motion to dismiss in which he argues in part that this 

court lacks jurisdiction over this permissive interlocutory appeal because the 

issue BNSF has presented for review in its appellant’s brief materially differs from 

the issue it presented in its petition for permissive appeal and which the trial court 

granted it permission to appeal. Accordingly, we set forth in detail the factual and 

procedural background of this appeal, that we may appropriately address Baca’s 

jurisdictional argument. 
4

foreseeability, and cause-in-fact. See Tufariello v. Long Island R.R., 458 F.3d 

80, 87 (2d. Cir. 2006); Abraham v. Union Pac. R.R., 233 S.W.3d 13, 17 (Tex. 

App.—Houston [14th Dist.] 2007, pet. denied). But a plaintiff’s burden to 

establish a railroad’s liability under FELA is lighter than it would be in an ordinary 

negligence case because FELA prescribes a relaxed standard of causation. See 

Lynch v. Ne. Reg’l Commuter R.R., 700 F.3d 906, 911 (7th Cir. 2012); Abraham, 

233 S.W.3d at 17. Under that relaxed causation standard, a plaintiff is entitled to 

prevail on a FELA claim if the railroad’s negligence played any part, even the 

slightest, in producing the injury or death for which damages are sought. See 

CSX Transp., Inc. v. McBride, 564 U.S. 685, 688, 705 (2011); BNSF Ry. Co. v. 

Nichols, 379 S.W.3d 378, 382 (Tex. App.—Fort Worth 2012, pet. denied). This 

relaxed causation standard is often referred to as a “featherweight” standard. 

See Maritime Overseas Corp. v. Ellis, 971 S.W.2d 402, 406 (Tex. 1998).

A. BACA’S FELA CLAIM

Baca sued BNSF alleging a claim under FELA.

4

 His theory of liability is 

straightforward: he claims that his exposure to toxic substances and dusts, 

including asbestos and asbestos-containing products and materials, while in the 

course of his employment with BNSF caused him to develop asbestosis. 

Because whether a causal connection exists between a person’s exposure to a 

chemical and a disease from which he suffers is outside the common knowledge 

 

4Baca also alleged claims for negligence per se and negligent infliction of 

emotional distress. Those claims are not at issue in this appeal.
5

and experience of lay persons, expert testimony is generally required to prove

such a causal connection. See Guevara v. Ferrer, 247 S.W.3d 662, 665 (Tex. 

2007); Abraham, 233 S.W.3d at 18; Pilgrim’s Pride Corp. v. Smoak, 134 S.W.3d 

880, 893–94 (Tex. App.—Texarkana 2004, pet. denied). Baca retained Dr. 

Schonfeld to do just that. 

B. DR. SCHONFELD’S REPORT

Dr. Schonfeld is a pulmonologist whose qualifications to make an opinion 

as to whether Baca’s exposure to asbestos during his employment with BNSF 

caused him to develop asbestosis are not at issue. In support of his claim, Baca 

produced a report from Dr. Schonfeld, in which Dr. Schonfeld summarized his

opinion concerning that question. 

Dr. Schonfeld’s report states that he interviewed and examined Baca. The 

report sets forth the history of Baca’s exposure to asbestos, which was relayed to 

Dr. Schonfeld by Baca. According to the report, Baca’s working career has 

almost exclusively been as a railroad worker. Baca was laid off from the railroad 

in approximately 1965, so for a few months he worked for the Arizona Highway 

Department, where he used asbestos gloves when removing hot objects from a 

stove. But other than those few months in 1965, the report says, Baca worked 

for the railroad from 1964 to 1996.

Baca told Dr. Schonfeld that on an intermittent basis for about six months 

in 1964, he helped demolish a roundhouse in Winslow, Arizona, and he would 

sweep up asbestos without the use of a mask or respirator. Baca also told Dr. 
6

Schonfeld that he rode on diesel engines that had asbestos in the ceiling and 

that the asbestos dust would fall on him. Dr. Schonfeld further stated that Baca 

remembered asbestos was in the brake hoses and that for about six months, he 

fired the asbestos-clad steam generator on the diesel passenger units and 

performed repairs on the steam generator on an as-needed basis. Baca further 

told Dr. Schonfeld that he worked in refrigerator cars that were lined with 

asbestos and that he would clean them out and sweep up asbestos. Finally, 

Baca told Dr. Schonfeld that he was present while other employees were 

changing brake shoes and that he was in other places where employees were 

working on and repairing the railroad’s rolling stock. 

Dr. Schonfeld noted that Baca had never smoked. He performed a 

physical examination on Baca, which revealed that his lungs “were clear to 

auscultation and percussion.” He also noted a report from Dr. Donald Breyer, 

who on August 30, 2011, had done a B-reading of a chest x-ray that had been 

performed on Baca on August 16, 2011.

5

 Dr. Schonfeld relayed Dr. Breyer’s 

findings, stating Dr. Breyer concluded the x-ray showed irregular interstitial 

infiltrates in both mid- and lower-lung zones having a “shape and size of s/s and 

a profusion of 1/0” and that Dr. Breyer had not noted any pleural abnormalities. 

Dr. Schonfeld also noted that Baca had undergone pulmonary function tests in 

2012 and that the results were normal. 

 

5Baca also designated Dr. Breyer, a board-certified diagnostic radiologist 

and a certified ILO “B” Reader, as an expert. 
7

Based upon all of this information, Dr. Schonfeld concluded as follows:

Given [Baca’s] history of significant exposures to asbestos in the 

workplace and given an appropriate latency and given the 

roentgenographic findings described above, I feel with a reasonable 

degree of medical certainty that Mr. Baca is diagnosed as having 

bilateral asbestosis. I feel with a reasonable degree of medical 

certainty that this diagnosis is causally related to his workplace 

exposures to asbestos as noted above. 

BNSF subsequently filed a motion to exclude Dr. Schonfeld’s causation opinion. 

II. PROCEDURAL BACKGROUND

A. BNSF’S MOTION TO EXCLUDE

In its motion to exclude, BNSF argued that Dr. Schonfeld’s causation 

opinion was inadmissible because it was unreliable.6 See Daubert, 509 U.S. at 

589 (stating Rule 702 of the Federal Rules of Evidence requires “that any and all 

scientific testimony or evidence admitted is not only relevant, but reliable”); 

Robinson, 923 S.W.2d at 550, 556–57 (holding Rule 702 of the Texas Rules of 

Evidence requires the same). It advanced two grounds for why that opinion was 

unreliable. First, BNSF argued Dr. Schonfeld’s causation opinion was not based 

on a reliable evidentiary foundation. Second, it argued that Dr. Schonfeld’s 

methodology was unreliable. In making these two arguments, BNSF 

acknowledged FELA’s featherweight causation standard. But it asserted that 

FELA, though relaxing the standard of causation relative to a common-law 

negligence claim, does not similarly relax the procedural standards for 

 

6BNSF did not contend that Dr. Schonfeld’s opinion was inadmissible 

because it was irrelevant.
8

determining the threshold issue of whether an expert’s causation opinion is 

admissible. Thus, even though this is a FELA case, BNSF argued, Dr. 

Schonfeld’s causation opinion must meet state procedural requirements for 

reliability to be admissible, including the requirements of Daubert and Robinson.

See Kan. City S. Ry. Co. v. Oney, 380 S.W.3d 795, 800 (Tex. App.—Houston 

[14th Dist.] 2012, no pet.) (“As a general matter, FELA cases adjudicated in state 

courts are subject to state procedural rules, but the substantive law governing 

them is federal.” (quoting St. Louis Sw. Ry. Co. v. Dickerson, 470 U.S. 409, 411 

(1985))).

Having argued that the trial court was required to apply state procedural 

standards of reliability to Dr. Schonfeld’s opinion, BNSF then discussed the 

standards it believed apply in this case. Citing Austin v. Kerr-McGee Refining 

Corp., 25 S.W.3d 280, 292 (Tex. App.—Texarkana 2000, no pet.), it noted that a 

plaintiff in a toxic tort case must establish both general and specific causation. 

BNSF focused on specific causation in particular, citing Havner, 953 S.W.2d at 

714, for the proposition that “[s]pecific causation asks whether the substance at 

issue caused a particular plaintiff’s injury.” It pointed to caselaw noting that 

asbestosis appears to be a dose-related disease, meaning “the more one is 

exposed, the more likely the disease is to occur, and the higher the exposure the 

more severe the disease is likely to be.” Borg-Warner, 232 S.W.3d at 771

(quoting 3 David L. Faigman et al., Modern Scientific Evidence: The Law and 

Science of Expert Testimony § 28:22, at 447 (2007)). And it also asserted that 
9

medical science has established that mere background levels of exposure to 

asbestos are not sufficient to cause disease; rather, pointing in part to BorgWarner, 232 S.W.3d at 771, BNSF stated, “[t]he accepted threshold exposure for

developing asbestosis is at least 4-5 fiber years (f/cc years), and more likely 25 

to 100 fiber years.” 

With the foregoing in view, BNSF turned to discuss Daubert and 

Robinson’s reliability standards. It first contended Daubert and Robinson require 

expert testimony to be based upon a reliable evidentiary foundation. And in the 

context of an asbestosis case, BNSF argued, evidence of the amount—or 

dose—of asbestos the plaintiff was exposed to is a necessary evidentiary 

foundation for an expert to reliably opine that the plaintiff’s exposure to asbestos 

caused him to develop asbestosis because without knowing the dose, an expert

has no reliable basis upon which to conclude that the plaintiff’s exposure to 

asbestos met or exceeded the scientifically-accepted exposure threshold that is 

necessary to cause that disease. To support that contention, BNSF relied on 

Borg-Warner, 232 S.W.3d at 773, as well as Abraham, 233 S.W.3d at 21, in 

which one of our sister courts stated that “[k]nowledge of the extent of exposure 

to a potentially harmful substance is essential to any reliable expert opinion that 

the particular substance caused a disease.”

Second, BNSF contended Daubert and Robinson require the methodology 

underlying the expert’s testimony to be reliable. See Daubert, 509 U.S. at 592–

93; Robinson, 923 S.W.2d at 557. Conducting that inquiry, BNSF argued, 
10

requires the trial court to consider whether the expert’s methodology (1) has 

been subjected to peer review and publication, (2) has a high known or potential 

rate of error, (3) has standards controlling its operation, and (4) enjoys general 

acceptance within a relevant scientific community. See Daubert, 509 U.S. at 

593–94; Robinson, 923 S.W.2d at 557. Pointing to Havner, 953 S.W.2d at 715,

BNSF acknowledged that in a toxic-tort case such as this one, a plaintiff simply 

may not be able to obtain reliable, direct evidence of the amount of the plaintiff’s 

exposure to the toxin. But again pointing to Havner, 953 S.W.2d at 720, BNSF 

stated that in such cases, the expert can utilize epidemiological studies to 

circumstantially establish that the plaintiff’s exposure or dose levels were

comparable to or greater than the levels of the subjects in those studies, but the 

expert must exclude any other plausible causes of the plaintiff’s injury or 

condition with reasonable certainty. 

BNSF then argued that Dr. Schonfeld’s opinion did not satisfy either of 

these two reliability requirements.

B. BACA’S RESPONSE

In response to BNSF’s motion, Baca acknowledged that because he 

brought his FELA claim against BNSF in state court, the trial court was required 

to apply federal substantive law but state procedural law in considering BNSF’s 

motion. He also acknowledged that decisions concerning the relevance and, 

consequently, the admissibility of expert testimony are generally based upon 

procedural rules of evidence. However, Baca argued, whether an expert’s 
11

testimony is relevant and, therefore, admissible is a question that necessarily

depends upon the causation standard that applies to the claim under 

consideration. Citing Brown v. Western Railway of Alabama, 338 U.S. 294, 298 

(1949), Baca maintained that state procedural rules cannot be applied in such a 

way as to impose unnecessary burdens upon the rights of recovery authorized by 

FELA and argued that FELA’s featherweight causation standard should 

“significantly influence a determination of the admissibility of an expert’s 

causation testimony.” 

Baca argued that FELA’s featherweight causation standard impacted state 

procedural standards governing the admissibility of expert testimony in two ways. 

First, Baca argued, FELA’s lower causation standard rendered Borg-Warner and 

Havner wholly inapplicable in FELA cases. Second, Baca insisted that given 

FELA’s featherweight causation standard, the admissibility standards set forth in 

Daubert and Robinson are relaxed in FELA cases such that the trial court should

more leniently apply Daubert and Robinson to expert testimony in a FELA case 

than it would in a non-FELA case. 

C. THE TRIAL COURT’S RULING

The trial court considered BNSF’s motion to exclude by submission. On 

January 20, 2017, the trial court issued a letter ruling indicating that it had denied 

the motion. Additionally, in the letter, the trial court explained the basis of its 

ruling: it stated that in denying the motion, it “went with the plaintiff on the issue 

of the application of FELA causation standards to . . . Dr. Schonfeld’s opinion on 
12

causation.” The trial court ultimately signed an order denying BNSF’s motion to 

exclude and granting it permission to seek a permissive interlocutory appeal

because it found the order involved a controlling question of law as to which 

there is substantial ground for difference of opinion and an immediate appeal 

would materially advance the ultimate termination of this litigation. In pertinent 

part, the trial court’s order provides,

The controlling question of law as to which there is substantial 

ground for difference of opinion is whether the Federal Employers 

Liability Act’s (45 U.S.C. §§ 51-60) lower causation standard—i.e. 

whether a railroad’s negligence played any part, even the slightest, 

in bringing about the injury—makes inapplicable the expert 

admissibility standards expressed in cases like E.I. DuPont de

Nemours & Co. v. Robinson, 923 S.W.2d 549 (Tex. 1995) and 

Merrell Dow Pharmaceuticals, Inc. v. Havner, 953 S.W.2d 706 (Tex. 

1997). The Court answered this question in the affirmative, holding 

that FELA’s lower causation standard contemplates a lower 

admissibility threshold for causation evidence.

An immediate appeal of this interlocutory Order would materially 

advance the ultimate termination of this litigation because the 

Court’s ruling allows the jury to consider causation evidence that 

would otherwise be excluded. The answer to this question, 

therefore, determines whether this case may be resolved without a 

trial on the merits. 

D. BNSF’S PETITION FOR PERMISSIVE APPEAL AND BACA’S RESPONSE

BNSF subsequently filed a petition for permissive appeal. In its petition, 

BNSF stated that the sole issue it was presenting for appeal was “[w]hether 

FELA’s lower causation standard—i.e., whether a railroad’s negligence played 

any part, even the slightest, in bringing about the injury—makes Texas’s expert 

admissibility standards inapplicable?” 
13

At our request, Baca filed a response to BNSF’s petition. In his response, 

Baca stated that he agreed that the trial court’s order met the jurisdictional 

standard for a permissive appeal set forth in civil practice and remedies code 

section § 51.014(d), but he stated that he disagreed “with the way in which the

issue has been framed by both the trial court and BNSF” because the way the 

trial court and BNSF had framed the issue for permissive review did not “fully

encompass the nature of the legal issues which are implicated by this appeal.” 

Baca suggested his own phrasing of the question presented for review, a 

phrasing that he believed more accurately reflected the issue presented in this 

appeal: “Whether the FELA’s lower causation standard—i.e. whether a railroad’s 

negligence played any part, even the slightest, in bringing about the injury—may 

be modified by applying state expert admissibility rules to impose a higher 

causation standard.” Baca then concluded by stating he did not “oppose 

interlocutory review of the issue raised by this appeal” but that he requested that 

we “grant review on the issue as [he had] more accurately presented it” in his 

response.

We then granted BNSF’s petition for permissive appeal. See Baca, 

2017 WL 2570826, at *1.

III. JURISDICTION

In conjunction with filing his appellee’s brief, Baca filed a motion to dismiss, 

challenging this court’s jurisdiction over this appeal. Baca argues we lack 

jurisdiction for two reasons. First, he argues that this appeal no longer involves a 
14

controlling question of law as to which there is a substantial ground for difference 

of opinion. See Tex. Civ. Prac. & Rem. Code § 51.014(d). And second, Baca 

contends this court has already concluded that it is not proper to review by 

permissive, interlocutory appeal a trial court’s decision whether to exclude an 

expert’s opinion as insufficiently reliable under Robinson. See Blakenergy, Ltd. 

v. Oncor Elec. Delivery Co., No. 02-14-00241-CV, 2014 WL 4771736, at *1 (Tex. 

App.—Fort Worth Sept. 25, 2015, no pet.) (mem. op.). Neither of these 

arguments is persuasive.

A. APPLICABLE LAW

We have jurisdiction to consider a permissive, interlocutory appeal by 

virtue of a statutorily authorized exception to the general rule that we have 

jurisdiction over final judgments only. See Tex. Civ. Prac. & Rem. Code Ann.

§ 51.014(d); Eagle Gun Range, Inc. v. Bancalari, 495 S.W.3d 887, 889 (Tex. 

App.—Fort Worth 2016, no pet.). Under that exception, we may permit an

appeal from an interlocutory order that otherwise would not be immediately 

appealable if (1) the order involves a controlling question of law as to which there 

is a substantial ground for difference of opinion and (2) an immediate appeal 

from the order will materially advance the ultimate termination of the litigation. 

Tex. Civ. Prac. & Rem. Code Ann. § 51.014(d), (f).
15

B. A CONTROLLING QUESTION OF LAW RESOLVED BY THE TRIAL COURT

REMAINS AT ISSUE

We first address Baca’s argument that this appeal no longer involves a 

controlling question of law. As Baca reads it, the trial court’s order involves only 

a very narrow controlling question of law: whether one specific Texas case—

Havner—applies to a FELA claim. He gets to this reading by stating that he has 

conceded Robinson applies to a FELA claim. Baca maintains that having so 

conceded, there is no “substantial disagreement” between the parties as to 

whether Robinson applies. Therefore, argues Baca, since Havner is the only 

other case referenced in the trial court’s order, the trial court’s order only involves 

the narrow controlling question of law of whether Havner applies to a FELA 

claim. With that premise in place, Baca turns to BNSF’s appellant’s brief, 

contending that BNSF did not argue in its brief that Havner applies to a FELA 

claim; it only argued that Robinson does. Baca reasons that because he agrees 

Robinson applies to a FELA claim and BNSF has not argued that Havner does, 

this appeal no longer involves a controlling question of law. 

Baca’s argument is based entirely on the assumption that the controlling 

question of law involved in the trial court’s order is the narrow question of 

whether two specific Texas cases—Robinson and Havner—apply in a FELA 

case. But that is not so. From the face of the trial court’s order and the record, it 

is clear that the controlling question of law involved in the trial court’s order is not 

the narrow question of whether Robinson and Havner, exclusively, are applicable 
16

in determining the admissibility of an expert’s causation opinion in a FELA case. 

Rather, the controlling question of law involved in the trial court’s order is the 

broad question of whether FELA’s lower causation standard also lowers the 

admissibility threshold of causation evidence in a FELA case such that the expert 

admissibility standards expressed in cases like Robinson and Havner are 

inapplicable in determining the admissibility of an expert’s causation opinion in a 

FELA case.

1. The Plain Language of the Order

We start with the language of the trial court’s order. In relevant part, the 

order states:

The controlling question of law as to which there is substantial 

ground for difference of opinion is whether the [FELA’s] lower 

causation standard—i.e. whether a railroad’s negligence played any 

part, even the slightest, in bringing about the injury—makes 

inapplicable the expert admissibility standards expressed in cases 

like [Robinson] and [Havner]. The Court answered this question in 

the affirmative, holding that FELA’s lower causation standard 

contemplates a lower admissibility threshold for causation evidence.

The trial court’s order does not say that the controlling question of law involved in 

its order was whether FELA’s causation standard makes Robinson and Havner

inapplicable in a FELA case. Nor does the order say that the controlling question 

of law was whether FELA’s causation standard makes the admissibility standards 

expressed in Robinson and Havner inapplicable in a FELA case. Both of these 

formulations would have limited the controlling question of law involved in the trial 
17

court’s order to a question of the applicability of Robinson and Havner,

specifically. Yet the trial court’s order used neither formulation.

Instead, the language in the trial court’s order states the controlling 

question of law as “whether the [FELA’s] lower causation standard . . . makes 

inapplicable the expert admissibility standards expressed in cases like 

[Robinson] and [Havner].” (Emphasis added). The phrase “expressed in cases 

like [Robinson] and [Havner]” is a modifier that clarifies the phrase preceding it—

“expert admissibility standards.” Examining the language of that modifying 

phrase, the placement of the words “cases like” before “[Robinson] and [Havner]” 

makes plain that the controlling question of law in the trial court’s order is not 

limited to whether Robinson and Havner, specifically, are applicable. To read the 

order as involving only the applicability of Robinson and Havner, as Baca does, 

is to entirely erase the words “cases like” from the trial court’s order. So the 

order involves the applicability of “the expert admissibility standards expressed in 

cases like Robinson and Havner,” not the applicability of Robinson and Havner

exclusively.

This construction is confirmed by another portion of the trial court’s order 

that Baca’s reading would also erase. After the portion stating the controlling 

question of law, the very next sentence in the trial court’s order states, “The 

Court answered this question in the affirmative, holding that FELA’s lower 

causation standard contemplates a lower admissibility threshold for causation 

evidence.” In this sentence, the trial court explains that it had decided that 
18

[FELA’s] “lower causation standard . . . makes inapplicable the expert 

admissibility standards expressed in cases like [Robinson] and [Havner].” And it 

explained the sole reason why it had made that decision was its legal conclusion 

that “FELA’s lower causation standard contemplates a lower admissibility 

threshold for causation evidence.” That language confirms the trial court had 

broadly ruled that FELA’s relaxed causation standard lowers Texas’s 

admissibility threshold for causation evidence in a FELA case.

Thus, when all of the pertinent language in the trial court’s order is given 

effect, it is clear that the controlling question of law on which the trial court ruled 

is broader than the narrow question only of whether Robinson and Havner apply 

in a FELA case. Rather, the trial court’s ruling was as follows: because FELA’s 

lower causation standard contemplates a lower admissibility threshold for 

causation evidence, FELA’s lower causation standard makes inapplicable the 

expert admissibility standards expressed in cases like Robinson and Havner.

2. The Record

That the controlling question of law involved in the trial court’s order is not 

limited to the narrow question of whether Robinson and Havner, specifically,

apply in a FELA case is also confirmed by the record.

In its motion to exclude, BNSF anticipated Baca would argue that “in light 

of the causation standard under FELA, the standards for reliability and 

admissibility of expert causation opinions should be relaxed.” BNSF maintained 
19

that FELA’s relaxed causation standard does not relax the standards for 

admissibility of expert causation opinions in a FELA case. 

Baca indeed made the argument BNSF anticipated he would. In Section 

V, Paragraph D of his response to BNSF’s motion, Baca argued that “[i]t is well 

established that FELA’s featherweight causation standard should significantly 

influence a determination of the admissibility of an expert’s causation testimony.”7 

In Section V, Paragraph E of his response, Baca argued that “[t]he remedial 

nature of FELA has a significant effect on the admissibility of expert testimony.” 

He pointed to Hines as “the leading case on point,” stating that the Hines court 

had held that “FELA[’s] relaxed standard of causation also relaxes the threshold 

of admissibility for the reception of expert testimony.” Baca argued that because 

of this relaxed admissibility standard, (1) Havner is inapplicable in a FELA case 

and (2) Robinson “should be applied with a more lenient standard” in a FELA 

case.8 

 

7For this “well established” proposition, Baca cited only one case: Hines v. 

Consolidated Rail Corp., 926 F.2d 262, 269 (3d Cir. 1991). 

8As part of his argument for why this case no longer involves a controlling 

question of law, Baca argues that he agrees that Robinson applies to his FELA 

claim and that, therefore, there is no substantial disagreement between the 

parties as to the applicability of Robinson in this case. Not so. It is patently clear 

that the parties did disagree as to the applicability of Robinson to Dr. Schonfeld’s 

causation opinion. As we have noted, BNSF argued that Robinson’s 

admissibility standards apply the same in a FELA case as they do in a non-FELA 

case, whereas Baca argued that those standards apply differently—that is, “more 

lenient[ly]”—in a FELA case than in a non-FELA case. 
20

The trial court considered BNSF’s motion by submission. Before signing 

the order denying the motion, the trial court first sent a letter ruling to the parties 

informing them of its decision. In the letter, the trial court explained that it had 

decided to deny the motion and explained its reason for doing so, stating that it 

“went with [Baca] on the issue of the application of FELA causation standards 

to . . . Dr. Schonfeld’s opinion on causation.” The trial court referred the parties 

to specific portions of Baca’s response to BNSF’s motion, telling them to “[s]ee 

generally paragraph[s] D & E” of the response. The trial court additionally stated 

that it “believe[d] this to be a ‘controlling question of law as to which there is 

substantial ground for difference of opinion.’” 

Thus, the record confirms that the parties disagreed over the broad 

question of whether FELA’s lower causation standard lowers the threshold of 

admissibility for expert causation testimony; that the trial court ruled in the 

affirmative on that broad question; and that the trial court based its decision to 

deny BNSF’s motion solely upon its resolution of that broad question.

Given the foregoing, we disagree with Baca’s argument that this appeal no 

longer involves a controlling question of law, as well as with his argument that 

BNSF’s appellant’s brief presents a controlling question of law that differs from 

the one the parties presented to the trial court and which the trial court resolved.

C. BACA’S RELIANCE ON BLAKENERGY

Baca also notes that BNSF has argued only that Robinson applies to his 

FELA claim; it has not argued that Dr. Schonfeld’s opinion fails to meet 
21

Robinson’s admissibility standards. But he argues that, to the extent BNSF’s 

appeal can be construed as presenting the issue of whether Dr. Schonfeld’s 

opinion satisfies Robinson’s admissibility standards, this court has already 

determined it is not appropriate to review by permissive appeal a “plain vanilla 

expert challenge under Robinson”—that is, a trial court’s determination of 

whether an expert’s testimony satisfies Robinson’s admissibility standards. See 

Blakenergy, 2014 WL 4771736, at *1. He asks us to follow our precedent in 

Blakenergy and dismiss this appeal. 

Assuming Baca’s characterization of our decision in Blakenergy is correct,

we need not address this argument because this appeal does not present the 

“plain vanilla expert challenge” of whether Dr. Schonfeld’s opinion satisfies 

Robinson’s admissibility requirements.9 Rather, the trial court denied BNSF’s 

motion to exclude based on its legal conclusion that because FELA’s 

featherweight standard of causation “contemplates a lower admissibility threshold 

for causation evidence,” state procedural standards governing the admissibility of 

expert testimony “expressed in cases like [Robinson] and [Havner]” are 

inapplicable in a FELA case. Thus, the sole issue in this appeal is a pure 

question of law: whether FELA’s causation standard lowers the admissibility 

threshold for causation evidence in FELA cases.

 

9Because we need not address this argument, we express no opinion as to

the merit of Baca’s characterization of this court’s denial of the petition for 

permissive appeal in Blakenergy. See id. 
22

Because we are unpersuaded by Baca’s arguments that this appeal no 

longer involves a controlling question of law, we deny his motion to dismiss. 

IV. THE TRIAL COURT’S ERRONEOUS LEGAL CONCLUSION WAS 

AN ABUSE OF DISCRETION

In its sole issue, BNSF argues the trial court abused its discretion by 

concluding that in a FELA case, FELA’s featherweight causation standard lowers 

our state’s standards governing the admissibility of expert testimony. 

A. STANDARD OF REVIEW

Even in a FELA case, a trial court’s evidentiary rulings, including its

decision whether to admit expert testimony, is subject to an abuse-of-discretion

standard of review. See Abraham, 233 S.W.3d at 17; Mo. Pac. R.R. v. Navarro, 

90 S.W.3d 747, 750 (Tex. App.—San Antonio 2002, no pet.). Here, the trial court

based its decision to deny BNSF’s motion to exclude solely on its determination

of a pure question of law. A trial court has no discretion to make an erroneous 

legal conclusion even in an unsettled area of law. In re United Scaffolding, Inc., 

301 S.W.3d 661, 663 (Tex. 2010) (orig. proceeding); In re Mo. Pac. R.R., 

998 S.W.2d 212, 216 (Tex. 1999). We review a trial court’s determination of a 

pure question of law de novo, affording no deference to the trial court’s 

conclusion. See RSI Int’l, Inc. v. CTC Transp., Inc., 291 S.W.3d 104, 107 (Tex. 

App.—Fort Worth 2009, no pet.).
23

B. APPLICABLE LAW

As a general rule, when a plaintiff brings a FELA claim in state court, the

court applies federal substantive law and state procedural law. See Dickerson, 

470 U.S. at 411; Oney, 380 S.W.3d at 800. But a state procedural rule may not 

interfere with, lessen, or destroy any of the substantive rights afforded to the 

plaintiff under FELA. See Brown, 338 U.S. at 298–99; Scott v. Atchison, Topeka 

& Santa Fe Ry., 572 S.W.2d 273, 281 (Tex. 1978) (op. on reh’g); Oney, 

380 S.W.3d at 800. Any state procedural rule that does so must yield. See 

Brown, 338 U.S. at 298–99; Scott, 572 S.W.2d at 281; Oney, 380 S.W.3d at 

799–800.

C. TEXAS’S PROCEDURAL STANDARDS APPLY

In accordance with the general rule that state courts apply state procedural 

law in cases brought under a federal statute in state court, Texas courts apply 

state rules of evidence when determining the admissibility of expert testimony in 

FELA cases. See Nichols, 379 S.W.3d at 382 (“Although [appellees’] claim is 

pursuant to [FELA], the trial court must follow state procedure in determining the 

reliability of expert testimony.”); Abraham, 233 S.W.3d at 18 (“Despite the fact 

that appellants assert a claim under the [FELA], the trial court must follow state 

procedure in determining the reliability of expert testimony.”); Navarro, 90 S.W.3d 

at 754–59 (applying state procedural rules in determining the admissibility of 

expert testimony in a FELA case). Accordingly, as relevant here, in a FELA case 

brought in state court, expert testimony must be reliable to be admissible. See 
24

Nichols, 379 S.W.3d at 382 (citing Robinson, 923 S.W.2d at 556). This general 

proposition is not in dispute here. 

In the trial court, Baca argued that FELA’s featherweight causation 

standard relaxes Texas procedural standards for determining the admissibility of 

expert testimony regarding causation in a FELA case. The trial court agreed and 

based its decision to deny BNSF’s motion to exclude solely on that legal 

conclusion. BNSF argues that this conclusion is contrary to what the courts in 

this state, the federal courts, and the courts in many other states have 

recognized: the standard of causation under FELA and the standards for 

admission of expert testimony under the applicable rules of evidence are distinct 

issues that do not affect one another. Thus, BNSF argues, the trial court abused 

its discretion by concluding that FELA’s featherweight causation standard relaxes 

our state’s procedural standards for admissibility of expert testimony in a FELA 

case. 

1. Texas Authorities

BNSF is correct that two of our sister courts have squarely held that 

FELA’s featherweight causation standard does not lower the threshold for 

admissibility of expert testimony in a FELA case. The first to do so was the

Fourth Court of Appeals in Navarro. See 90 S.W.3d at 751. That case involved

a FELA claim in which the plaintiff alleged that her exposure to diesel exhaust 

during her employment with the defendant railroad caused her to develop bone 

marrow cancer. Id. at 749. On appeal, the railroad argued that the testimony of 
25

the plaintiff’s causation experts should have been excluded because the 

testimony was scientifically unreliable. Id. at 749. In addressing that argument,

the court acknowledged FELA’s lower burden of causation but noted that lower 

burden had “not been generally applied to the admissibility of expert testimony” in 

a FELA case and that “the Daubert standard of admissibility of expert evidence

[in a FELA case] extends to each step in an expert’s analysis all the way through 

the step that connects the work of the expert to the particular case.”10 Id. at 751

(internal quotation omitted). And in analyzing whether the challenged expert 

causation testimony was unreliable, the court applied Texas’s standards. See id.

at 754–59.

The Fourteenth Court of Appeals followed suit in Abraham. See

233 S.W.3d at 17–20. That was a FELA case in which the plaintiffs alleged that 

their exposure to creosote during their employment with the defendant railroad 

caused them to suffer diseases of the throat, lungs, and skin, including cancer. 

Id. at 16. The defendant railroad challenged the plaintiff’s expert’s causation 

opinion on the ground that it was not scientifically reliable. Id. The court applied 

state procedural standards in determining the reliability of the challenged expert 

testimony. See id. at 18 (citing Robinson, 923 S.W.3d at 565). It agreed that the 

standard of causation under FELA and the standards of expert testimony under 

the rules of evidence are distinct issues and do not affect one another. See id. at 

 

10The court noted that our supreme court adopted Daubert in Robinson. 

See id. at 750.
26

19–20. And, consequently, it agreed that FELA’s featherweight causation 

standard did not relax our state’s procedural standards governing the 

admissibility of expert testimony such that courts must admit expert testimony in 

FELA cases that would be inadmissible in other contexts. See id.

We also find the supreme court’s decision in In re GlobalSantaFe Corp., 

275 S.W.3d 477 (Tex. 2009) (orig. proceeding), instructive to our analysis. That 

case involved a claim under the Jones Act, which provides for a cause of action

against the employer of a seaman who sustains an injury or death in the course 

of his employment. See 46 U.S.C.A. § 30104 (West 2007); GlobalSantaFe, 

275 S.W.3d at 479–80, 480 n.1. The Jones Act expressly incorporates FELA

and the case law developing that statute. See Ellis, 971 S.W.2d at 406; see also 

46 U.S.C.A. § 30104. Thus, like FELA, the Jones Act establishes a 

featherweight standard of causation. See Ellis, 971 S.W.2d at 406. And courts 

therefore often look to caselaw applying FELA when analyzing claims under the 

Jones Act. See Wills v. Amerada Hess Corp., 379 F.3d 32, 46–47, 47 n.9 (2d 

Cir. 2004) (looking to FELA cases when analyzing whether the Jones Act’s 

relaxed standard of causation lowered the standards for admissibility of expert 

testimony under the rules of evidence); see also Lies v. Farrell Lines, Inc., 

641 F.2d 765, 770 (9th Cir. 1981) (noting that because the Jones Act expressly 

incorporates FELA and case law developing that statute, the court could 

“appropriately look to FELA cases to test the sufficiency of the allegations and 

proof in this Jones Act claim”).
27

In GlobalSantaFe, the supreme court considered whether the Jones Act 

preempted certain provisions of Chapter 90 of the civil practice and remedies 

code, including section 90.004, which requires a plaintiff in silica cases to serve a 

detailed expert report on each defendant. See 275 S.W.3d at 479–80; see also 

Tex. Civ. Prac. & Rem. Code Ann. § 90.004 (West 2017). This provision, the 

court said, “endeavors to assure that claims are not brought and pursued unless 

they are supported by reliable expert evaluations of the claimant.” 

GlobalSantaFe, 275 S.W.3d at 482. After discussing the general principles of 

preemption in Jones Act cases, the court concluded that “[t]he requirements 

embedded in Chapter 90 to assure reliable expert confirmation of silica-related 

diseases are not preempted by the Jones Act.”

11

 See id. at 486. 

In explaining its conclusion, the court discussed the standards governing 

the admissibility of expert testimony. See id. at 486–87. In particular, it noted 

that federal caselaw has developed standards for admission of expert testimony

that focus on the trial court’s role in determining the reliability of such testimony

and that Texas caselaw, drawing heavily from federal jurisprudence, had 

developed similar standards. See id. It then discussed the issue of whether the 

Jones Act’s featherweight causation standard affected the application of state 

procedural rules governing the admission of expert testimony. The court said,

 

11The court concluded, however, that the Jones Act preempts section 

90.004(b)(2) because that provision “requires claimants in some cases to 

establish a minimal level of impairment,” which conflicts with the Jones Act. See 

id. at 483, 489.
28

To the extent that Jones Act jurisprudence recognizes a special 

standard for proving causation, federal cases have held that this 

causation standard does not exempt Jones Act cases from the 

general rules for admission of expert testimony. We see no basis for 

holding that Texas law generally governing the admission of expert 

testimony, which draws so heavily from federal law, is preempted by 

the Jones Act.

Id. (citations omitted). Thus, in GlobalSantaFe, the supreme court expressed 

disapproval of the notion that a featherweight causation standard alters the 

applicability of Texas law generally governing the admission of expert testimony.

2. Federal and State Authorities

The decisions in Navarro, Abraham, and GlobalSantaFe are in line with the 

overwhelming weight of authority in the federal courts, as well as the courts in 

other states. As BNSF has pointed out in its brief, several federal authorities 

have held that a featherweight causation standard—whether under FELA or the 

Jones Act—does not relax the threshold of admissibility for expert testimony. 

See, e.g., Wills, 379 F.3d at 47 (noting that “the standards for determining the 

reliability and credibility of expert testimony are not altered merely because the 

burden of proof [under the Jones Act] is relaxed”); Claar v. Burlington N. R.R., 

29 F.3d 499, 503 (9th Cir. 1994) (“The standard of causation under FELA and the 

standards for admission of expert testimony under the Federal Rules of Evidence 

are distinct issues and do not affect one another.”); see also Taylor v. Consol.

Rail Corp., No. 96-3579, 1997 WL 321142, at *6–7 (6th Cir. June 11, 1997)

(unpublished table decision) (holding that the typical standards for determining 

the admissibility of expert testimony “are not modified by the relaxed standard of 
29

proof in FELA cases”); Cantrell v. BNSF Ry. Co., No. Civ 12-0129, 2013 WL 

8632378, at *4 (D.N.M. June 28, 2013) (noting that the relaxed causation 

standard under FELA and the standard for admission of expert testimony are 

distinct issues that do not affect one another); Clements v. CSX Transp., Inc., 

No. 3:09-cv-122-TCB, 2011 WL 13136959, at *3 (N.D. Ga. Dec. 13, 2011) 

(noting that if a plaintiff in a FELA case chooses to introduce expert testimony, 

the trial court must apply the same admissibility analysis that applies in any other 

case), amended in part on other grounds, 2012 WL 12897089 (N.D. Ga. Jan. 9, 

2012). In addition, as BNSF observed in its brief, the courts in several states 

have concluded that FELA’s relaxed burden of proof does not alter the

applicability of their state’s procedural standards governing the admissibility of 

expert testimony. See, e.g., Smith v. CSX Transp., Inc., 806 S.E.2d 890, 893–94

(Ga. Ct. App. 2017); Smart v. BNSF Ry. Co., 369 P.3d 966, 971–72 (Kan. Ct. 

App. 2016); see also Russell v. Ill. Cent. R.R., No. W2013-02453-COA-R3-CV, 

2015 WL 4039982, at *2–3 (Tenn. Ct. App. June 30, 2015) (applying state 

procedural rules in determining admissibility of expert testimony in FELA case); 

McNeel v. Union Pac. R.R., 753 N.W.2d 321, 328–30 (Neb. 2008) (applying state 

procedural standards governing admissibility of expert testimony in a FELA case

in the same manner as in other cases.).

Thus, in addition to the fact that several Texas courts have concluded that 

a relaxed standard of causation does not relax our state’s procedural standards 

governing the admissibility of expert testimony, there is a broad range of 
30

authority from the federal courts and courts in other states holding that FELA’s 

lower causation burden does not alter the applicable procedural standards

governing the admissibility of expert testimony.

3. Baca’s Authorities

In his appellee’s brief, Baca did not address the merits of the question 

presented in this permissive appeal or the significant number of authorities BNSF 

presented in support of its position on that question. Rather, he reurged some of 

the arguments he made in his motion to dismiss this permissive appeal.

12

 Our 

analysis above concerning those arguments is equally applicable here, and we 

need not restate it. We note, however, that in his response to BNSF’s motion in 

the trial court, Baca cited two cases that he argued supported his position that 

FELA’s relaxed causation standard relaxed the threshold for admissibility of 

expert testimony in this FELA case. We briefly address those cases.

In his response in the trial court, Baca argued that “[i]t is well established 

that FELA’s featherweight causation standard should significantly influence a 

determination of the admissibility of an expert’s causation testimony.” For this 

proposition, he cited only one case: Hines v. Consolidated Rail Corp., 926 F.2d 

262 (3rd Cir. 1991). Indeed, the court in that case concluded that the causation 

 

12That is, in his appellee’s brief, Baca argues that because he agrees that 

Robinson applies to his claim, and because BNSF has not specifically argued 

that Havner and Borg-Warner apply, “there is nothing further for this [c]ourt to 

consider[,] and this [c]ourt should affirm the trial court’s ruling on BNSF’s motion 

to exclude the expert opinions of Dr. Schonfeld.” 
31

standard under FELA can significantly influence a determination of the 

admissibility of expert testimony. Id. at 269. However, as our sister court 

observed in Abraham, the Hines decision predates the Supreme Court’s seminal 

decision in Daubert, which articulated standards for assessing the reliability of 

expert testimony. Abraham, 233 S.W.3d at 18. And of course, our supreme 

court subsequently adopted Daubert. See Robinson, 923 S.W.2d at 556–57. As 

the cases we have discussed above demonstrate, since Daubert, Texas, federal, 

and sister-state courts have consistently applied in FELA cases the same experttestimony admissibility standards they apply in non-FELA cases. We thus find 

Hines unpersuasive. See Wills, 379 F.3d at 47 (declining to follow Hines and 

holding that “Daubert’s standards for determining the admissibility of expert 

testimony apply regardless of whether the plaintiff’s burden to prove causation is 

reduced”); Abraham, 233 S.W.3d at 20 (concluding Hines was unpersuasive 

because it was decided before Daubert and Robinson).

In his response in the trial court, Baca also argued that the Third Court’s 

decision in Navarro and the Fourteenth Court’s decision in Abraham, both of 

which concluded that FELA’s relaxed causation burden does not relax the 

standards for admissibility of expert testimony, are “no longer the law in a FELA 

case” after the Supreme Court’s decision in McBride. See McBride, 564 U.S. 

685; Abraham, 233 S.W.3d at 19–20; Navarro, 90 S.W.3d 750–51. But McBride

was a jury-charge case concerning whether the trial court had erred by failing to 

include a proximate-cause instruction in the jury charge. See 564 U.S. at 689–
32

90. The Court concluded it had not, holding that in FELA cases, juries “are 

properly instructed that a defendant railroad ‘caused or contributed to’ a railroad 

worker’s injury ‘if [the railroad’s] negligence played a part—no matter how 

small—in bringing about the injury.’” Id. at 705. Thus, McBride did not deal with 

the admissibility of expert testimony in FELA cases. And even after McBride, 

courts have continued to recognize a distinction between FELA’s causation

standard and the procedural standards governing the admissibility of expert 

testimony. See Whalen v. CSX Transp., Inc., No. 13 Civ. 3784, 2016 WL 

5723877, at *17 n.17 (S.D.N.Y. Sept. 29, 2016); Cantrell, 2013 WL 8632378, at 

*4; Clements, 2011 WL 13136959, at *3; Smith, 806 S.E.2d at 893–94; Farley v. 

BNSF Ry. Co., No. 112,872, 2016 WL 1169426, at *7 (Kan. Ct. App. Mar. 25, 

2016). We are therefore unpersuaded that McBride upended this wellestablished distinction.

4. Texas’s Admissibility Standards Apply

We agree with the reasoning of the courts that have concluded that the 

standard of causation under FELA and the standards for admission of expert 

testimony under the applicable rules of evidence are distinct issues that do not 

affect one another and that, consequently, FELA’s featherweight causation 

standard does not require a Texas trial court to admit expert testimony in a FELA 

case that would be inadmissible in a non-FELA case. See Claar, 29 F.3d at 

503–04; Abraham, 233 S.W.3d at 19–20. We therefore hold that FELA’s 

featherweight causation standard does not render inapplicable in FELA cases
33

our state procedural law governing the admissibility of expert testimony. The trial 

court abused its discretion by concluding to the contrary. See United Scaffolding, 

301 S.W.3d at 663 (“[A]n erroneous legal conclusion is an abuse of discretion, 

even if it may not have been clearly erroneous when made.”). We sustain 

BNSF’s sole issue.

V. CONCLUSION

Having concluded that this appeal continues to involve a controlling 

question of law as to which there is a substantial ground for difference of opinion, 

we deny Baca’s motion to dismiss. And having sustained BNSF’s sole issue, we 

reverse the trial court’s order denying BNSF’s motion to exclude and remand this 

case for further proceedings. See Tex. R. App. P. 43.2(d).

/s/ Lee Gabriel

LEE GABRIEL

JUSTICE

PANEL: WALKER, GABRIEL, and KERR, JJ.

DELIVERED: March 29, 2018