A look at the football fortunes of the four schools that have left the Big 12 in recent years:
Big 12 history: 16 seasons, no league titles, two North Division titles (2007, 2008), 63-66 conference record.
Big 12 void: Mizzou had become a solid Big 12 program, with at least a .500 conference record for seven straight seasons.
SEC performance: Disappointing maiden season in 2012, 5-7 overall and 2-6 in the league. But Mizzou won the SEC East this season with a 7-1 record, losing to Auburn in the championship game.
SEC outlook: Solid. Florida figures to rebound, but long-dormant Tennessee might not. So if Missouri can establish a recruiting base, it figures to challenge Georgia, South Carolina and Florida on a regular basis.
Big 12 history: 16 seasons, one conference title (1998), two division titles (1997, 1998), 68-61 conference record.
Big 12 void: Loss of tradition, but Aggies had just three winning conference records their last 11 years in the Big 12.
SEC performance: A&M went 11-2 last season, 6-2 in the conference, in 2012 but fell to 8-4 and 4-4 this season.
SEC outlook: Recruiting appears promising, and excitement remains high, but the SEC West Division is like the Big 12 South Division was a few years ago. And A&M did not fare well. Six of the last eight national champs (and eight of the last 13) have come from the SEC West or the Big 12 South.
Big 12 history: 15 seasons, and dominant early, with conference titles in 1997 and 1999, but none since. Six division titles, including 1996, 2006, 2009 and 2010; 81-39 conference record.
Final Big 12 seasons: Some momentum, with North Division titles their last two seasons, with tight championship game defeats to Texas (13-12 in '09) and OU (23-20 in '10).
Big Ten performance: One division title (2011) in three seasons, with an overall conference record of 17-7.
Big Ten outlook: Huskers came out good in Big Ten divisional realignment — the west division does not include Ohio State, Michigan, Michigan State and Penn State. Wisconsin, Iowa and Northwestern figure to be Nebraska's chief opposition.
Big 12 history: 15 seasons, one championship (2001), three other North Division titles, 60-60 conference record.
Final Big 12 seasons: Hard times. CU went 2-6 four of its last five seasons in the Big 12 and had a winning conference record just once (5-3 in 2005) in its final eight years in the league.
Pac-12 performance: Dismal. The Buffs have gone 2-7, 1-8 and 1-8 in its three Pac-12 seasons.
Pac-12 outlook: Dismal. The Buffs are in a division with Southern Cal, UCLA, Arizona State, Arizona and Utah. The arrow is pointing up on most of those programs. Who can Colorado jump?