World Boxing Organization (as they did with several established champions in the lower weight divisions), the WBO sanctioned a fight between two relatively unknown fighters, Francesco Damiani (winner of the super heavyweight silver medal at the 1984 Summer Olympics) and Johnny DuPlooy, to determine the inaugural holder of its own heavyweight title in 1989. All other sanctioning bodies of boxing recognized the then-undefeated Mike Tyson as the undisputed heavyweight champion. Damiani, meanwhile, went on to become the first WBO heavyweight champion. At heavyweight, especially in the United States, the organization initially struggled to gain credibility as a major sanctioning body, with WBO heavyweight
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,