Bill Callahan, American football player and coach

William E. Callahan is an American football coach who is the offensive line coach for the Tennessee Titans of the National Football League (NFL). He was the head coach of the Oakland Raiders in 2002 and 2003, leading them to Super Bowl XXXVII, where the Raiders lost to the Tampa Bay Buccaneers, 48–21. He was also the head coach for the Nebraska Cornhuskers from 2004 to 2007 and interim head coach for the Washington Redskins in 2019. Callahan is considered to be one of the best offensive line coaches in the NFL. His son Brian Callahan is the head coach of the Titans.