Parker has also been a member of the Dallas Cowboys, Baltimore Ravens, Atlanta Falcons, Carolina Panthers, and Denver Broncos.

Parker was signed by the Cleveland Browns as an undrafted rookie free agent on April 29, 2005.

After spending some time on their active roster where he played in four games and made five tackles, he was waived on September 3, 2006.

The team released defensive end Sean Conover to make room for Parker.

Carolina Panthers signed Parker on December 23, 2008, when defensive tackle Gary Gibson was placed on Injured reserve.