Career years: 1984-2004
Accolades: Career record of 41-2 with 32 wins by KO, undisputed world heavyweight champion, Olympic gold medalist (1988)
Last stand: World Heavyweight Championship, June 21, 2003, Staples Center, L.A.: Lennox Lewis defeats Vitali Klitschko by TKO (6 rounds)

Lenox "The Lion" Lewis has both held and lost the heavyweight title during his professional career. He became undisputed champion by defeating Holyfield in '99, then he KO'd Iron Mike in 2002, and finally he bested Vitali Klitschko for the last fight of his career in 2003. By the time Lenox Lewis finished off Klitschko for his last successful title defense, Vitali needed 60 stitches to his face to stop the bleeding. Yikes.