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 Light Heavyweight Championship (National Wrestling Association) 30, 1957, is the longest reign totaling 1,573 days. Danny McShain's third and seventh reign as champion only lasted seven days, although due to gaps in the championship history the possibility exists that someone else had a shorter reign. World Light Heavyweight Championship (National Wrestling Association) The National Wrestling Association World Light Heavyweight Championship was a professional wrestling championship originally sanctioned by the National Boxing Association (NBA) and subsequently sanctioned by the National Wrestling Association (NWA), an offshoot of the NBA. The championship had an upper limit of , anyone above that limit was considered a heavyweight. The championship was