Professional boxing knocked him out in brutal fashion. This fight made Hagler famous; he was able to lure Ray Leonard out of retirement in 1987, but lost in a highly-controversial decision. Hagler retired from boxing immediately after that fight. In the latter half of the decade young heavyweight Mike Tyson emerged as a serious contender. Nicknamed "Iron Mike", Tyson won the heavyweight unification series to become world heavyweight champion at the age of 20 and the first undisputed champion in a decade. Tyson soon became the most widely known boxer since Ali due to an aura of unrestrained ferocity, such as that
World Heavyweight Wrestling Championship (original version) the sixth longest reigning world heavyweight champion in history behind Bruno Sammartino, Jim Londos, Lou Thesz, Verne Gagne (who all held their world titles for over seven years) and Bob Backlund (who held his for nearly six years). Joe Stecher defeated American Heavyweight Champion Charlie Cutler to become the first widely recognized world heavyweight champion after the retirement of Frank Gotch. On April 15, 1925, Stanislaus Zbyszko defeated previous champion Wayne Munn to win the championship. However, Munn continued to be recognized as the World Heavyweight Champion in Michigan and in Illinois. Ed Lewis defeated Wayne Munn on February 2,