Question: Who was the head coach of the team that lost Super Bowl XIX?

Context articles: Gordon Gravelle
Jerry Markbreit
Super Bowl XIX
List of Seattle Seahawks head coaches
Jim Fahnhorst
Fred Quillan
1984 Miami Dolphins season
1988 Chicago Bears season
Tom Kelleher (American football official)
Milt McColl

Gordon Carr Gravelle (born June 12, 1949) is a former American football offensive tackle in the National Football League.
 Drafted out of Brigham Young University in the 1972 NFL Draft, Gravelle spent eight seasons with three teams: the Pittsburgh Steelers (1972–1976), the New York Giants (1977–1979), and the Los Angeles Rams (1979).
 He earned two Super Bowl rings in Super Bowl IX and Super Bowl X with the Steelers.
 He lost Super Bowl XIV in 1979 with The Los Angeles Rams.
Jerry Markbreit (born March 23, 1935) is a former American football referee in the National Football League (NFL) for 23 seasons and became one of the most recognizable referees in the game.
 Markbreit officiated football games for 43 seasons.
 From 1965 to 1975, Markbreit officiated college football games in the Big Ten Conference.
 He then joined the NFL in 1976 as a line judge before being promoted to the head referee position in just his second year.
 His uniform number in the league was 9, which is now worn by Mark Perlman.
 Until he retired from the NFL after the 1998 season, Markbreit officiated in two wild card (1991 and 1994), ten divisional (1979, 1981, 1982, 1985, 1986, 1987, 1988, 1995, 1997, and 1998), eight conference championship (1980, 1983, 1984, 1989, 1990, 1992, 1993, and 1996) playoff games, one Pro Bowl (1978), and four Super Bowls: Super Bowl XVII, Super Bowl XXI, Super Bowl XXVI, and Super Bowl XXIX and was an alternate in Super Bowl XIX, Super Bowl XXII, and Super Bowl XXVIII.
 To date, he is the only NFL head referee to officiate four Super Bowl games.
Super Bowl XIX was an American football game between the American Football Conference (AFC) champion Miami Dolphins and the National Football Conference (NFC) champion San Francisco 49ers to decide the National Football League (NFL) champion for the 1984 season.
 The 49ers defeated the Dolphins by the score of 38–16, to win their second Super Bowl.
 The game was played on January 20, 1985, at Stanford Stadium, on the campus of Stanford University in Stanford, California, a suburb of Silicon Valley within the San Francisco Bay Area.
The Seattle Seahawks are a professional American football team based in Seattle, Washington.
 They are members of the Western Division of the National Football Conference (NFC) in the National Football League (NFL).
 The team, along with the Tampa Bay Buccaneers, joined the NFL in 1976 as expansion teams.
 The Seahawks are the only team to have played in both the American Football Conference (AFC) and NFC Championship Games.
 The team has made three Super Bowl appearances; they lost to the Pittsburgh Steelers in Super Bowl XL, before winning Super Bowl XLVIII against the Denver Broncos.
 The Seahawks then lost Super Bowl XLIX to the New England Patriots.
James John Fahnhorst (born November 8, 1958) is a former National Football League linebacker from 1984 through 1990.
 During that span he was a member of three Super Bowl Champions and started in Super Bowl XXIII: Super Bowl XIX, Super Bowl XXIII and Super Bowl XXIV for the San Francisco 49ers.
 Jim grew up in St. Cloud, Minnesota and graduated from St. Cloud Tech High School.
 He played college football at the University of Minnesota where he was First Team All-Big Ten at Linebacker AP/UPI in 1981.
 He is the younger brother of former 49ers' tackle Keith Fahnhorst.
 Graduating with a BA in Psychology, and a minor in Criminology.
Frederick David Quillan (January 27, 1956 – September 12, 2016) was an American football offensive lineman who played in the National Football League (NFL) for the San Francisco 49ers from 1978 through 1987.
 He appeared in two Super Bowls: Super Bowl XVI and Super Bowl XIX and won both.
 He was a two-time Pro Bowl selection.
 Quillan played college football at the University of Oregon.
The 1984 Miami Dolphins season was the team's 19th season, and 15th in the National Football League.
 It was also the 15th season with the team for head coach Don Shula.
 The Dolphins sought to build on a spectacular 1983 season where they went 12–4 with rookie quarterback Dan Marino, only to be upended by the Seattle Seahawks in the playoffs.
The 1988 Chicago Bears season was their 69th regular season and 19th postseason completed in the National Football League.
 The Bears looked to improve on an 11–4 finish that won them the NFC Central Division but where they were eliminated for the second consecutive year by the Washington Redskins.
 The Bears won 12 games and lost 4, tying for the best record in the league with the Buffalo Bills and the AFC Champion Cincinnati Bengals, and earned home field advantage in the NFC.
 However, the Bears failed to advance to the Super Bowl as one of the top two seeds for a third straight season, falling to the eventual Super Bowl champion San Francisco 49ers in the NFC Championship Game at Soldier Field.
 This was the second time that the 49ers and Bears had met for a trip to the Super Bowl during the decade, with the 49ers defeating the Bears on their way to Super Bowl XIX.
Thomas "Tom" Kelleher (August 31, 1925March 31, 2011) was an American football official in the National Football League (NFL) for 28 years, from 1960 until the conclusion of the 1987 NFL season.
 Working as a back judge, Kelleher was assigned five Super Bowls; Super Bowl IV, Super Bowl VII, Super Bowl XI, Super Bowl XV and Super Bowl XIX; one of five officials to reach such an achievement.
 He wore number 25 for the major part of his career.
 For 1979 through 1981, Kelleher wore the number 7.
 He was born in Philadelphia, and died in Miami.
Dr. Milton McColl, M.D. (born August 28, 1959 in Oak Park, Illinois) was a National Football League linebacker from 1981 through 1988.
 During that span he appeared in two Super Bowls: Super Bowl XVI and Super Bowl XIX for the San Francisco 49ers.
 He played college football at Stanford University.
 He is the son of former Stanford and NFL end Bill McColl.