Question: Who was the last coach before Bob Stoops to win a national championship for the Oklahoma Sooners?
Context: The 2006 Oklahoma Sooners football team represented the University of Oklahoma in the 2006 NCAA Division I FBS football season, the 112th season of Sooner football.  The team was led by two-time Walter Camp Coach of the Year Award winner, Bob Stoops, in his eighth season as head coach.  They played their homes games at Gaylord Family Oklahoma Memorial Stadium in Norman, Oklahoma.  They were a charter member of the Big 12 Conference. The 2000 Oklahoma Sooners football team represented the University of Oklahoma in the 2000 NCAA Division I-A football season, the 106th season of Sooner football.  The team was led by Bob Stoops in his second season as head coach.  They played their home games at Oklahoma Memorial Stadium in Norman.  During this season, they competed in the Big 12 Conference. The Oklahoma Sooners football program is a college football team that represents the University of Oklahoma.  The team has had 22 head coaches since organized football began in 1895.  The Sooners have played in more than 1,200 games in its 121 seasons.  In those seasons, eight coaches have led the Sooners to postseason bowl games: Tom Stidham, Jim Tatum, Bud Wilkinson, Gomer Jones, Chuck Fairbanks, Barry Switzer, Gary Gibbs and Bob Stoops.  Eight coaches have won conference championships with the Sooners: Bennie Owen, Stidham, Dewey Luster, Tatum, Wilkinson, Fairbanks, Switzer and Stoops.  Wilkinson, Switzer and Stoops have also won national championships with the Sooners.  Stoops is the all-time leader in games coached and won, Owen is the all-time leader in years coached, while Switzer is the all-time leader in winning percentage.  John Harts is, in terms of winning percentage, the worst coach the Sooners have had as he lost the only game he coached.  John Blake has the lowest winning percentage of those who have coached more than one game with .353 in his 34 games. The 2001 FedEx Orange Bowl game was a post-season college football bowl game and BCS National Championship match between the University of Oklahoma Sooners and the Florida State Seminoles on January 3, 2001, at Pro Player Stadium in Miami Gardens, Florida.  Oklahoma defeated FSU 13–2 in a defensive battle to claim the National Championship as head coach Bob Stoops completed just his second season as the coach of the Sooners.  The game was part of the 2000–2001 Bowl Championship Series (BCS) of the 2000 NCAA Division I-A football season and represented the concluding game of the season for both teams.  The Orange Bowl was first played in 1935, and the 2001 game represented the 67th edition.  The contest was televised in the United States on ABC. The 2009 Oklahoma Sooners football team represented the University of Oklahoma in the 2009 NCAA Division I FBS football season, the 115th season of Sooner football.  The team was led by two-time Walter Camp Coach of the Year Award winner, Bob Stoops, in his 11th season as head coach.  They played their home games at Gaylord Family Oklahoma Memorial Stadium in Norman, Oklahoma.  They were a charter member of the Big 12 Conference. Michael Joseph Stoops (born December 13, 1961) is an American football coach and former player.  He is currently the defensive coordinator at the University of Oklahoma.  Stoops served as the head football coach at the University of Arizona from 2003 until his firing during the 2011 season.  He previously served as an assistant coach at the University of Iowa, Kansas State University, and Oklahoma.  He is the younger brother of Bob Stoops, the former head coach of the Oklahoma Sooners football program, and the older brother of Mark Stoops, head coach at the University of Kentucky. Jackie Vernold Shipp (born March 19, 1962) is a former American football linebacker who played in the National Football League.  Shipp also was the defensive line coach for the Oklahoma Sooners football team until his departure in the 2013 off season.  He had been on the Sooners' coaching staff since the arrival of Bob Stoops in 1999.  He was the defensive line coach at Arizona State from 2013-2015, and was the defensive line coach at the University of Missouri for part of the 2016 season. The 2012 Oklahoma Sooners football team represented the University of Oklahoma in the 2012 NCAA Division I FBS football season, the 118th season of Sooner football.  The team was led by two-time Walter Camp Coach of the Year Award winner, Bob Stoops, in his 14th season as head coach.  They played their home games at Gaylord Family Oklahoma Memorial Stadium in Norman, Oklahoma.  They were a charter member of the Big 12 Conference. The 2010 Oklahoma Sooners football team represented the University of Oklahoma in the 2010 NCAA Division I FBS football season, the 116th season of Sooner football.  The team was led by two-time Walter Camp Coach of the Year Award winner, Bob Stoops, in his 12th season as head coach.  They played their home games at Gaylord Family Oklahoma Memorial Stadium in Norman, Oklahoma.  They were a charter member of the Big 12 Conference. The 2000 NCAA Division I-A football season ended with the Oklahoma Sooners claiming their first national championship and their first conference championship since the departure of head coach Barry Switzer.
Answer: Barry Switzer