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In professional boxing, the undisputed champion of a weight class is a boxer who is recognized as the world champion at that class by each boxing organization.〔 〕 The term is also used in the UFC. ==History== Prior to the 1960s, most champions were "undisputed",〔 〕 although the term was rarely used (it does not appear in one 1970 ''Boxing Dictionary''〔 〕). Early boxing champions at various weight divisions were established by acclamation between 1880 and 1920. Once a consensus champion had been awarded the title, the championship could usually be taken only by beating the reigning holder, establishing a lineal championship. The New York State Athletic Commission (NYSAC) recognized champions from its foundation in 1920.〔Morrison, pp.14–15〕 The National Boxing Association (NBA) was founded by other U.S. state bodies in 1921, and began recognising champions in 1927.〔 Until the 1960s, both usually recognised the same lineal champion.〔 However, disputes could arise if the champion retired or moved to a different weight class. Occasionally, the International Boxing Union (renamed the European Boxing Union in 1946) 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 NBA renamed itself the World Boxing Association in 1962 (later based in Panama), and in 1963 the NYSAC, EBU and other countries formed the rival World Boxing Council, based in Mexico.〔 The number of disputed champions increased in the 1960s and especially in the 1970s.〔 Both bodies established separate official rankings and required champions to face their top-ranked contenders or forfeit their titles. Some of the most highly regarded and lucrative fights were unification bouts between rival champions to create an "undisputed champion". The International Boxing Federation (IBF) was founded as the USBA-I in 1976 and by 1984 had enough credibility to be considered major.〔 (【引用サイトリンク】title=IBF/USBA History ) 〕 The fragmentation of titles was thus increased. After some negotiations, the heavyweight title was unified in a series of co-ordinated bouts in 1985–87, with Mike Tyson emerging as the first undisputed champion (WBC, WBA & IBF) since Leon Spinks in 1978.〔 〕 The title was split again in 1992 when Riddick Bowe forfeited the WBC title. The World Boxing Organization (WBO), established in Puerto Rico in 1988, took longer to acquire credibility. By 2001, the WBA was giving the same recognition to WBO champions as to WBA, WBC and IBF champions.〔 〕 In 2004 the WBC began naming WBO champions on its ranking listings.〔Compare and 〕 The IBF did not recognise the WBO in May 2006,〔 〕 but was doing so by February 2007.〔 〕 Conversely, the WBO explicitly recognises the other three sanctioning bodies.〔 〕 Some sources consider the WBO title necessary for an undisputed champion.〔 〕〔 〕〔 〕〔 〕 Others continue to consider it sufficient to hold the WBA, WBC, and IBF titles.〔 〕〔 〕〔 〕 Other bodies such as the IBO, IBU, and World Boxing Foundation are disregarded. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「undisputed champion」の詳細全文を読む スポンサード リンク
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