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
Quintuple champion Quintuple champion In different sports an athlete who wins five crowns, titles, medals, belts, or other distinctions is called a Quintuple Champion. In boxing, a quintuple champion is a boxer who has won world titles in at least five different weight classes. The first man in boxing to earn this distinction was Thomas Hearns on November 4, 1988. Hearns won first the Welterweight (147 lbs) title, later annexed the Super Welterweight (154 lbs) belt. Rather than win the next closest division in weight, the Middleweight (160 lbs), he moved up to three divisions to earn the Light Heavyweight (175 lbs)