Only 14 times in the 131-year history of Oklahoma football have the Sooners finished the season without a single loss. Eleven of the 14 unbeaten seasons are shared by OU's four winningest head coaches.
Oklahoma's last unbeaten season and the only time the Sooners have won as many as 13 games in a single season was in OU's 2000 national championship season. That occurred in Bob Stoops' second season as head coach of the Sooners and following a 7-5 season in 1999.
Stoops had six 12-win seasons and six 11-win teams in his 18 seasons as the Oklahoma head coach, but just twice did he lose as few as one game in a season (in 2000 and in 2004, when the Sooners were 12-0 before losing to USC in the BCS national championship game).