Sims' professional career began in 2002 with the Kansas City Chiefs, for whom he played through the end of the 2006 season.
Sims played college football for the University of North Carolina and was the sixth overall pick in first round of the 2002 NFL draft.
[1] Sims was a college teammate of the Carolina Panthers defensive end Julius Peppers.
Sims is a member of Phi Beta Sigma fraternity and was initiated into the Xi Gamma Chapter while at UNC-Chapel Hill during the Spring 2000 semester.
During his tenure with Kansas City, Sims played in a total of 74 games and notched 54 tackles, 5 sacks, and 1 interception.