In 2007, Dorsey started 13 of 14 games recording 69 tackles, 7 sacks, 12.5 tackles for loss, three passes defensed, and a forced fumble. He was also named the SEC Defensive Player of the Week twice during the season. Following the 2007 season, he was recognized as a unanimous first-team All-American. He also finished ninth in the 2007 voting for the Heisman Trophy, receiving more votes than any other defensive player in the nation. In addition, Dorsey was awarded the Bronko Nagurski Trophy, the Outland Trophy, the Lott Trophy and the Lombardi Award, becoming the only player to win all four awards. Dorsey was a member of LSU's 2007 BCS Championship team. He was a key component in LSU’s drive to the BCS national title despite playing the second half of the season with knee and tailbone injuries.