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
Boxing in the United States bronzes. Most heavyweight champions of this century originate from the United States. The first recorded women's boxing match in the United States occurred in New York in 1888, when Hattie Leslie beat Alice Leary in a brutal fight. Barbara Buttrick was the first woman to appear on a televised boxing match. Women's boxing at a professional and amateur was rarely acknowledged until 1970's Cathy 'Cat' Davis , Marian “Tyger” Trimiar and Jackie Tonawanda were pioneers as they were the first women in the United States to get a license for boxing in the United States. Cathty Davis was the female