Undisputed champion he was still described as "undisputed champion" by some reports. After Joe Calzaghe's super middleweight victory over Mikkel Kessler in November 2007, he was frequently described as "undisputed champion". Others disputed this, because although he held the WBA, WBC, and WBO belts, he vacated his IBF title in November 2006 rather than face a mandatory challenger, and immediately vacated other titles as well. The unified champion is defined as a boxer that holds at least two world championships of major sanctioning bodies (WBA, WBC, WBO or IBF) in their respective division. Around 2004, the World Boxing Association recognized three different
Undisputed championship championship unification. Gotch wrestled for several years before retiring as undisputed champion Other wrestlers who were recognized as the only major World Champion following Gotch's retirement were Earl Caddock, Joe Stecher, Ed "Strangler" Lewis, Stanislaus Zbyszko, and Wayne Munn. The championship became disputed in the late 1920s, and remained that way for over 20 years, when several major World Heavyweight Championships split from the primary title (namely, Boston's American Wrestling Association World Heavyweight Championship, the National Boxing Association (later, National Wrestling Association) World Championship of Wrestling, and the New York State Athletic Commission World Heavyweight Championship). Other governing bodies would