RB: Adrian Peterson, Oklahoma (2004-06) -- Nicknamed "A.D." because he could run "All Day," Peterson set an FBS freshman record with 1,925 rushing yards while finishing second to Matt Leinart in the '04 Heisman voting. Injuries plagued his next two seasons, but he still was a force and rushed for more than 1,000 yards to finish with 4,041 career rushing yards and 41 touchdowns before turning pro early.
WR: Justin Blackmon, Oklahoma State (2009-11) -- Blackmon joined Texas Tech's Michael Crabtree as the only receiver to win the Biletnikoff twice. In those two seasons, Blackmon put up 233 receptions, 3,304 receiving yards and 38 touchdowns. Blackmon gets the slight nod over Crabtree, because Oklahoma State won its first Big 12 title with Blackmon at wideout, while the Red Raiders came up just short with Crabtree.
DT: Ndamukong Suh, Nebraska (2005-09) -- There was no more dominant defensive tackle during the BCS era than Suh. After registering 12 tackles and 24 tackles for loss, he placed fourth in the Heisman voting in '09, and won a host of national awards, including the Outland, Lombardi, Nagurski and Bednarik. Suh too went on to become the second overall pick in the draft.
S: Roy Williams, Oklahoma (1999-01) -- Williams was a major part of Oklahoma's revival at the turn of the millennium. He was one of the Sooners' best players on the 2000 national championship team, before winning the Thorpe and Nagurski awards in '01. That year, he also was the Big 12 defensive player of the year and a unanimous All-American while placing seventh in the Heisman voting.