Question: What American football coach once took over for Mike Cavan, and now coaches the Panthers?

Context articles: Rusty Russell (American football coach)
SMU Mustangs football under Tom Rossley
1997 SMU Mustangs football team
1998 SMU Mustangs football team
Phil Bennett (American football)
SMU Mustangs football under Mike Cavan
Mike Shula
Mike Kelly (American football coach)
Mike Cavan
Dana Holgorsen

Harvey N. "Rusty" Russell (December 1895 – December 21, 1983) was an American football coach.
 He is mostly known for head coaching Southern Methodist University from 1950-52 as well as the longtime head coach at an Orphanage in Fort Worth Texas, The Masonic Home and School.
 Russell was inducted to the Texas High School Football Hall of Fame in 1990, and is also a member of the Sports Hall of Fame at Howard Payne University, the school he graduated from in 1922, as well as The Texas High School Coaches Hall of Honor, and The Texas Sports Hall of Fame.
 He won NCAA National Coach of the week when at SMU, once in 1950 and again in 1951 for his respective wins over Ohio State and Notre Dame .
 He helped co-author the American Football Coaches Association (AFCA) Code of Ethics in 1952 along with Coaches Bill Murray of Duke, Lloyd Jordan of Harvard and Bud Wilkinson of Oklahoma.
 That document is still used today.
 Russell was also a charter member of the National Football Hall of Fame Association.
 While in College at Howard Payne University in Texas, he was a three sport letterman (Track, Basketball and Football), was captain of both the Basketball and Football teams, and was named All Conference End in football in 1921 in the TIAA (Texas Intercollegiate Athletic Association- forerunner of the Southwest Conference).
Tom Rossley was the coach of the Southern Methodist University's football team from 1991 to 1996.
 He compiled a 15–48–3 record, and was succeeded by Mike Cavan.
The 1997 SMU Mustangs football team represented Southern Methodist University in the 1997 NCAA Division I-A football season as members of the Western Athletic Conference (WAC) in the Mountain Division.
 They played their home games at the Cotton Bowl in Dallas, Texas.
 Under first-year head coach Mike Cavan and ten years after the NCAA's 1987 "death penalty" on SMU football, SMU finished the 1997 season with a 6–5 record and completed their first winning season since the football program resumed operations in 1989.
The 1998 SMU Mustangs football team represented Southern Methodist University in the 1998 NCAA Division I-A football season as members of the Western Athletic Conference (WAC) in the Mountain Division.
 They played their home games at the Cotton Bowl in Dallas, Texas.
 Head coach Mike Cavan returned for his second season leading SMU, following a 6–5 season in 1997, SMU's first winning season since the 1987–88 SMU "death penalty" was handed down by the NCAA, the highest punishment possible in the association.
 SMU finished the season 5–7 (4–4 WAC), but SMU vacated 10 games after Steve Malin was found to have been ineligible due to academic fraud.
Phil Bennett (born December 3, 1955) is an American football coach and former player.
 He is the defensive coordinator at Arizona State Sun Devils.
 Prior to this position, he served as the defensive coordinator for the Baylor Bears from 2011-2016, and was interim head coach of the Pittsburgh Panthers during their 2011 BBVA Compass Bowl win over Kentucky after serving as defensive coordinator of the Panthers for three seasons.
 Prior to coaching the Panthers, he served as the head football coach at Southern Methodist University (SMU) from 2002 to 2007.
 Before his stint at SMU, he served as an assistant coach at seven different colleges.
Mike Cavan was the coach of the Southern Methodist University's football team from 1997 to 2001.
 He compiled a 22–34–0 record, and was succeeded by Phil Bennett.
Mike Shula (born June 3, 1965) is an American football coach who is the offensive coordinator for the Carolina Panthers of the National Football League (NFL).
 Shula has been with the Panthers since 2011, when he was hired as their quarterbacks coach.
 He was promoted to offensive coordinator after Rob Chudzinski was hired to be the head coach of the Cleveland Browns.
 Shula served as the head football coach at the University of Alabama, his alma mater, for four seasons, from 2003 to 2006.
Mike Kelly (born January 26, 1948) is a former American football coach.
 He was the head football coach at the University of Dayton from 1981 to 2007.
 In 27 years as the head coach at Dayton, he compiled a record of 246–54–1.
 He led the Dayton Flyers to the NCAA Division III Football Championship in 1989 and appearances in the title game three other times, in 1981, 1987, and 1991.
 Kelly ranks among the top 25 college football coaches of all time in both winning percentage (.819) and wins (246).
 Among coaches with at least 25 years of experience, he has the fourth best winning percentage of all time.
Mike Cavan (born April 15, 1948) is a former American football player and coach.
 He served as the head coach at Valdosta State University (1986–1991), East Tennessee State University (1992–1996) and Southern Methodist University (1997–2001), compiling a career college football record of 89–83–2.
 Cavan played as a quarterback at the University of Georgia from 1968 to 1970 and was an assistant coach there from 1977 to 1985.
Dana Carl Holgorsen (born June 21, 1971) is an American football coach and former player.
 He is the current head football coach at West Virginia University, having succeeded Bill Stewart on June 10, 2011.
 At the end of the 2010 season West Virginia athletic director Oliver Luck announced that Holgorsen was hired as the offensive coordinator for the 2011 season and would become the Mountaineers 33rd head football coach in 2012.
 During his coaching career he has served under innovative coaches such as Hal Mumme, Mike Leach, Kevin Sumlin, and Mike Gundy at Oklahoma State.