Michael Moorer

Michael Lee Moorer (born November 12, 1967) won world championships 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; 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.[2] 

Michael Moorer was the first southpaw to win a heavyweight title [3]. He beat Evander Holyfield for the unified WBA, IBF and lineal heavyweight titles in 1994. He remains one of only two southpaws to win the lineal world championship at heavyweight. Moorer is only one of four boxers over the last century that has ever won a version of a world title at both light heavyweight and heavyweight. Moorer was inducted into the International Boxing Hall of Fame as part of the class of 2024.[5]