Michael Spinks (born July 13, 1956) is an American former professional boxer who competed from 1977 to 1988. He is a two-weight world champion, having held the undisputed light heavyweight title from 1983 to 1985, and the lineal heavyweight title from 1985 to 1988. As an amateur he won a gold medal in the middleweight division at the 1976 Summer Olympics.
Nicknamed "Jinx", which spawned the nickname of his right hand, "The Spinks Jinx", Spinks is the brother of former world heavyweight champion Leon Spinks, and uncle of Cory Spinks, a former welterweight and light middleweight champion.
After a successful amateur career, which culminated in his Olympic gold medal win, Spinks went undefeated in his first 31 professional fights, beating such opponents as Dwight Muhammad Qawi, Eddie Mustafa Muhammad, Marvin Johnson and Eddie Davis en route to becoming the undisputed light heavyweight champion. Following ten successful title defenses, Spinks moved up to heavyweight, and as an underdog defeated long-reigning IBF heavyweight champion Larry Holmes; in doing so, Spinks became the first reigning light heavyweight world champion to win the heavyweight title. In his final fight, Spinks was knocked out by Mike Tyson in 91 seconds, the only defeat of his professional career.
Spinks has been inducted into the International Boxing Hall of Fame and the World Boxing Hall of Fame. The International Boxing Research Organization and BoxRec rank Spinks among the ten greatest light heavyweights of all time.