Undisputed championship (boxing)

In boxing, the undisputed champion of a weight class is the boxer who simultaneously holds world sanctioning organisations recognized major by each other and the International Boxing Hall of Fame. There are currently four major sanctioning bodies: WBA, WBC, IBF and WBO. There were many undisputed champions before the number of major sanctioning bodies recognizing each other increased to four in 2007, but there have only been 18 boxers to hold all four titles simultaneously.