Whiteside was selected by the Indianapolis Colts in the fifth round, with the 162nd overall pick, of the 2003 NFL draft.[3] He played two seasons for the Colts.[4] He officially signed with the team on July 24, 2003. He was waived on August 31, 2003.[5]
Whiteside was claimed off waivers by the Cincinnati Bengals on September 1, 2003. He was waived by the Bengals on October 22, 2003.[5]
Whiteside was signed to the practice squad of the Colts on October 27, 2003. He was promoted to the active roster on November 19 and played in five games for the Colts during the 2003 season, recording one solo tackle and one assisted tackle. Whiteside appeared in seven games for the Colts in 2004, totaling two solo tackles. He was placed on injured reserve on November 11, 2004. He was placed on the physically unable to perform list on June 14, 2005. Whiteside was waived by the Colts on July 28, 2006.[5]
