Pierson was selected by the
Oakland Raiders in the fourth round, with the 129th overall pick, of the 2003 NFL draft. He officially signed with the team on July 25, 2003. He was waived on August 31 and signed to the practice squad on September 2. Pierson was promoted to the active roster on November 12 and played in six games for the Raiders during the 2003 season, recording six solo tackles and two assisted tackles. Pierson was traded to the
Chicago Bears on August 30, 2004 for an undisclosed draft pick. He was waived on September 5 and signed to the Bears' practice squad on September 7. He was promoted to the active roster on September 22 and appeared in six games for the Bears in 2004, totaling one solo tackle and three assisted tackles. Pierson signed with the
Orlando Predators of the
Arena Football League on October 12, 2005. He was waived on January 20, 2006. ==Death==