RB, Wisconsin, Sr.
He was fourth in the voting last season, when he tied Barry Sanders's record with 39 total TDs and led the nation with 1,923 rushing yards. Though the Badgers must replace three offensive linemen, the arrival of veteran QB Danny O'Brien from Maryland should only benefit Ball's campaign.
QB, USC, Sr.
The spotlight will be on Troy once again with Barkley most likely entering the season as the Heisman favorite. No returning QB threw for more TDs than his 39 in 2011. In putting off the NFL to return for his senior year, Barkley could deliver the program its record-tying seventh Heisman winner.
QB, Oklahoma, Sr.
He's the nation's active leader in career passing yards (12,379) but regressed in 2011. Yards, TDs and completion percentage all fell, and he threw a career-worst 15 picks. His hopes hinge on finding a go-to receiver after the departure of Ryan Broyles.