13. Troy Calhoun, Air Force
Record: 49-41 in seven seasons.
Buzz: Calhoun enjoyed success in his first four seasons with the Falcons, winning 34 games from 2007-10. But after a 7-6 season in year five in 2011, Air Force has won a total of eight games the past two seasons, including a 2-10 mark last season that was the school's worst since 1980 (that was Ken Hatfield's second season with the Falcons after he replaced Bill Parcells). Air Force has lost 14 of its past 17 games overall, with the wins coming over Army, Colgate and Hawaii. This season looks as if it will be a long one; the offense returns just three starters, and a defense that was shredded last season doesn't look all that good, either. Calhoun is an Air Force alum, and his passion for the program runs deep. But would that be enough if the Falcons again struggle?