No. 21. Chris Hairston, OT, Clemson
2010 numbers: He had 31 knockdowns in a team-high 821 snaps in 13 games (13 starts). He allowed just one sack and had at least one knockdown in every game.
Previous ranking: Not ranked.
Making the case for Hairston: He was a big reason Clemson ranked among the nation’s top 30 teams in sacks allowed. He was Clemson’s highest-rated offensive lineman in film grades in six games, and led the team with an 82.3 percent average.