Michael Spinks turned professional with a win over Eddie Benson, knocked out in one round on April 17, 1977 in Las Vegas. With that, Spinks began a 31 fight winning streak that would almost extend to the end of his career. After four more wins, Spinks finished '77 with the first fight that began a gradual ascent in opposition quality: an eight-round decision over Gary Summerhays, a popular young boxer of the time. In 1978, Spinks won two fights, including an eight-round decision over former world Middleweight title challenger Tom Bethea, in the same undercard where his brother Leon dethroned Ali as
Michael Spinks 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