The MW grew to twelve teams in 2013, as did the American Athletic Conference in 2015; both structured themselves into six-team divisions and began staging championship games.
In January 2016, the NCAA approved championship games for smaller conferences, provided the championship game features either (1) the top two teams at the end of a full round-robin conference schedule, or (2) the winners of each of two divisions, with each team playing a full round-robin schedule within its division.
[6] Following that change to NCAA rules, the Big 12 reinstated its championship game in 2017,[7] operating with 10 teams in a single division while playing a full round-robin schedule.
[8] At that time, the SBC operated with all teams in a single division but did not play a full round-robin schedule and did not hold a championship game.
The conference dropped to 10 football members after the football-only memberships of Idaho and New Mexico State were not extended following the 2017 season.