Thornton was selected by the Indianapolis Colts in the fourth round of the 2002 NFL draft.[1] Thornton best season came in 2003 when he led the Colts with 145 tackles and made two interceptions. In the 2005 season Thornton made 83 tackles and two quarterback sacks.
Tennessee Titans
He became an unrestricted free agent and signed a five-year deal with the Titans on March 13, 2006 [1]. After missing the 2010 season due to a hip injury, he retired on August 5, 2011.[2]
In 2012, he became the director of player engagement with the Colts. In 2023, he was promoted to Vice President of Player Engagement with the Colts.[3]