Heavyweight unification series Heavyweight unification series The heavyweight unification series, also known as the Heavyweight World Series, was a sequence of professional boxing matches held in 1986 and 1987 to crown an undisputed champion of the heavyweight class. The series was produced by HBO Sports and promoted by Don King. It ended with Mike Tyson as undisputed champion, holding the championship belts of the International Boxing Federation, World Boxing Association, and World Boxing Council. Prior to the series, the last undisputed heavyweight champion had been Leon Spinks, who won the championship in his 1978 victory over Muhammad Ali. Spinks had been stripped of
AWA World Heavyweight Championship (Boston version) AWA World Heavyweight Championship (Boston version) The AWA World Heavyweight Championship was a professional wrestling championship promoted by Paul Bowser in Boston. The title was created by Bowser after Gus Sonnenberg, who had beaten Ed Lewis for the original World Heavyweight Wrestling Championship in 1929, was stripped of the title by the National Boxing Association. Browser continued to recognize Sonnenberg as champion and named his championship after the "American Wrestling Association" governing body, which hitherto did not actually exist. Rival promoters, including Jack Curley, countered by forming the National Wrestling Association and its NWA World Heavyweight Championship. During Don Eagle's