Which head coach of these two teams--Alabama Crimson Tide and Oklahoma Sooners--had the longest time with their team during the 2013 football season?
2013 Alabama Crimson Tide football team: The 2013 Alabama Crimson Tide football team (variously "Alabama", "UA", "Bama" or "The Tide") represented the University of Alabama in the 2013 NCAA Division I FBS football season. 2013 Alabama Crimson Tide football team:  The team was led by head coach Nick Saban, in his seventh year, and played its home games at Bryant–Denny Stadium in Tuscaloosa, Alabama. 2013 Oklahoma Sooners football team: The 2013 Oklahoma Sooners football team represented the University of Oklahoma in the 2013 NCAA Division I FBS football season, the 119th season of Sooner football. 2013 Oklahoma Sooners football team:  The team was led by two-time Walter Camp Coach of the Year Award winner, Bob Stoops, in his 15th season as head coach.
Bob Stoops