Boxing in the 1970s was world champion when Ali returned. Former world champions Jimmy Ellis and Floyd Patterson as well as George Foreman, Oscar Bonavena, Jerry Quarry, Earnie Shavers, Leon Spinks, Ken Norton, as well as Larry Holmes, Ron Stander, Chuck Wepner, Jose King Roman, Light Heavyweight champ Foster, John Tate, Jimmy Young, Ron Lyle, Joe Bugner, Scott LeDoux and many others added intrigue to the division. Don King surged as a leading boxing promoter, and champions Duran, Monzon and Ali had historic rivalries with Esteban De Jesús, Rodrigo Valdez and Frazier, respectively. Boxing in the 1970s During the 1970s, boxing was characterized by
Boxing at the 2015 Pan American Games – Men's Heavyweight Boxing at the 2015 Pan American Games – Men's Heavyweight The men's heavyweight competition of the boxing events at the 2015 Pan American Games in Toronto, Ontario, Canada, was held between the 18 and 24 of July at the General Motors Centre. The defending champion is Lenier Pero of Cuba. Heavyweights is limited to those boxers weighing less than or equal to 91 kilograms. Like all Pan American boxing events, the competition is a straight single-elimination tournament. Both semifinal losers are awarded bronze medals, so no boxers compete again after their first loss. Bouts consist of a 3 rounds "10-point