Our final Big 12 power rankings of the regular season:
1. Oklahoma (previous ranking: 1): Baker Mayfield has all but clinched the Heisman, and the Sooners are one game away from clinching a spot in the College Football Playoff.
2. TCU (2): Gary Patterson and the Horned Frogs get another shot at the Sooners. But they'll have to play the first half without standout safety Nick Orr, who was suspended for the first half for his role in a skirmish against Baylor.
3.