Undisputed champion recognised a different champion. The disputes were usually short-lived as a lucrative fight would be organised between the rival champions. The longest split was ten years, of the middleweight title, between Mickey Walker's move up to heavyweight in 1931 and NBA champion Tony Zale's defeat of NYSAC contender Georgie Abrams in 1941. An early use of "undisputed" appears in a "New York Times" preview of the 1941 fight. The growing popularity of boxing outside of the USA led to creation of various boxing organizations, each strengthening their influence (most notably BBBofC) and having their own champion. This resulted in a
International Boxing Organization 1990s that removed subjective elements from the ratings in an effort to bring more credibility to the sport. From 2014 the organization now uses Boxrec, the independent boxing records keeping and computerized rankings website for IBO's rankings. Many marquee champions have held and continue to hold the International Boxing Organization World title. If a fighter tests positive for banned substances after a bout, he is barred from a rematch. The IBO permits only one champion per weight division. "We have never had more than one champion per weight division nor will we", according to its president Ed Levine. If an