He led Oklahoma to a national championship in 2000, 10 Big 12 championships and 14 seasons of double-digit victories, and held a 190-48 overall record before handing off the program to Riley ahead of the 2017 season.

He has remained active around the program, including helping to coach a practice last year when the staff was short-handed due to COVID-19 cases.

Riley's departure is a big blow to the Sooners, who are about to transition into the SEC.