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
Jack Lester (boxer) Jack Lester (boxer) Jack Lester (2 May 1891 – 1916) was an American heavyweight boxer. He was born in Calumet, Michigan as Jack Jubeck on May 2, 1891 to Polish parents. He was raised in Cle Elum, Washington. Lester's record was fairly unspectacular, though his knockout ratio in winning bouts was fairly high. His first manager was Harry Burns, but in 1910, ex-boxing champion Tommy Burns took Lester on. Tommy Burns sent Lester to Australia in 1911 to gain fight experience, and in September that year he beat Bill Lang, the Australian heavyweight champion, by points. While in Australia Lester