Despite his record-breaking season, he finished second to USC quarterback Matt Leinart in the Heisman Trophy voting.  Among other honors, he was a finalist for the Doak Walker Award ,  and the first Oklahoma freshman recognized as a First-Team Associated Press All-American .  Peterson contributed to a perfect regular season for the Oklahoma Sooners and participated in the 2005 BCS National Championship Game with a berth to the 2005 Orange Bowl against USC Trojans .  USC retooled their defense to stop Peterson and limited him to just 82 yards, as the Trojans defeated the Sooners by a score of 55–19. USC later vacated the win due to NCAA infractions. After the season, he had surgery on his left shoulder to strengthen the muscles around the joint.