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
Cory Spinks in a fight with Verno Phillips at the Scottrade Center in St. Louis, Spinks lost the IBF Junior Middleweight Championship via controversial split decision. On April 24, 2009, Spinks reclaimed the vacant IBF Junior Middleweight Championship in a close split-decision victory over fellow St. Louis native Deandre Latimore. Spinks fought back after suffering a 1st round knockdown to win by the scores of 115-112 Spinks, 115-112 Latimore and 114-113 Spinks. The fight was held at the Scottrade Center in St. Louis. On August 7, 2010, after a five-month delay due to scheduling conflicts, Spinks lost the IBF Junior Middleweight Championship