The award is given to college football's best player, voted on by the FBS head coaches and sports information directors.
Nix, a senior nose tackle, started 11 of the Irish's 13 games in 2012. He recorded 50 tackles, the most of any Notre Dame defensive lineman. Nix added 7.5 tackles for loss, two sacks, and five bass breakups. He was named a CBSSports.com third-team All-American at the end of the season.
Tuitt, a junior defensive end, started all 13 games for Notre Dame last season. He recorded 47 tackles, 13 tackles for loss, three forced fumbles, one fumble recovery, and one blocked kick. He also led the team in sacks (12.0). He is tied with Irish linebacker Prince Shembo for the most sacks among active Notre Dame players (14.0). Tuitt was named a CBSSports.com and ESPN.com first-team All-American last season.
Alabama had the most players of any school on the list. The two-time defending national champions had four selections: running back T.J. Yeldon, linebacker C.J. Mosley, quarterback A.J. McCarron, and wide receiver Amari Cooper.
Lee was a finalist for the award last season, along with Texas A&M's Johhny Manziel and Irish linebacker Manti Te'o. Te'o won the award.
Te'o became just the third defensive player to ever win the Walter Camp Player of the Year Award in 2012. Pittsburgh's Hugh Green won in 1980, and Michigan's Charles Woodson won in 1997.
Te'o was the fourth Notre Dame player to win the award. Tight end Ken MacAfee won in 1977, wide receiver Tim Brown won in 1987, and wide receiver Raghib "Rocket" Ismail won in 1990.