This format came under considerable criticism, especially from Nebraska and Oklahoma, who were denied a yearly match between two of college football's most storied programs. The Nebraska-Oklahoma rivalry was one of the most intense in college football history. (Until 2006, the teams had never met in the Big 12 Championship.) Due to the departure of Nebraska and Colorado in 2011, the Big 12 eliminated the divisions (and championship game) and instituted a nine-game round-robin format. With the advent of the College Football Playoff committee looking at teams' strength of schedule for picking the four playoff teams, on December 8, 2015 the Big 12 announced an annual requirement for all Big 12 teams to schedule a non-conference game against a team from the four other Power Five conferences (plus Notre Dame). Per Big 12 commissioner Bob Bowlsby: "Schedule strength is a key component in CFP Selection Committee deliberations. This move will strengthen the resumes for all Big 12 teams. Coupled with the nine-game full round robin Conference schedule our teams play, it will not only benefit the teams at the top of our standings each season, but will impact the overall strength of the Conference."