HEAVYWEIGHT upsets, as exciting as they are, generally cause absolute chaos. In fact, the current and seemingly never-ending situation of multiple champions can be traced back to February 1978 when Leon Spinks stunned undisputed king, Muhammad Ali, to win the world title.
Ali and Spinks decided on a rematch so the WBC stripped the new champion for failing to defend against No.1 contender, Ken Norton. Norton then picked up the belt by default, while Ali regained the WBA title from Spinks. It would take nine years until there was another unified champion when, in 1987, Mike Tyson outscored James “Bonecrusher” Smith to add the WBA belt to the WBC strap he already owned.
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