Michael Lee Moorer is an American former professional boxer who competed from 1988 to 2008. He won a world championship on four occasions in two weight classes, having held the WBO light heavyweight title from 1988 to 1991; compiling 22 straight KOs in 22 fights and the WBO heavyweight title from 1992 to 1993; the unified WBA, IBF and lineal heavyweight titles in 1994; and regained the IBF heavyweight title again from 1996 to 1997 becoming a three-time heavyweight world champion.
Michael Moorer was an undefeated southpaw in his first 35 professional bouts. He captured the WBO light heavyweight title in 1988 which he defended 9 times. In 1991, Moorer moved up to Heavyweight winning the vacant WBO heavyweight title from Bert Cooper via TKO in 1992. He went on to beat Evander Holyfield for the unified WBA, IBF and lineal heavyweight titles in 1994.