This week, we've been ranking the top 25 players in the Big 12 for the 2015 season.
We complete the countdown below with our top five players:
1. Baker Mayfield, QB, Oklahoma: The walk-on transfer completely transformed the mindset of the Sooners with a brash demeanor and unbridled confidence. Mayfield's season, which included a fourth-place finish in the Heisman voting, featured several signature moments, including the fourth-quarter comeback at Tennessee, the freestyle scramble and game-sealing touchdown pass at Baylor, and the block that sprung Joe Mixon's rout-inducing touchdown run at Oklahoma State.