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
William A. Spinks again, and while including French champion Edward Fournil, the bet specifically the top-three names in that era of the sport, namely Shaefer, Ives and George Franklin Slosson. The challenge was accepted by well-known Chicago pro Thomas Gallagher (in a match that future champion Ora Morningstar traveled all the way to Chicago to see). Spinks was apparently not a fan of upstart cueist Ives in particular. Days after issuing his caveat-laden challenge, Spinks was described by an onlooking journalist as "very uneasy until the seventeenth inning" as a spectator at the 14.2 balkline World Champion challenge between Ives and incumbent Schaefer;