when did they change boxing to 12 rounds
The distance (boxing) The following year on March 27, 1983, the first ever heavyweight title fight scheduled for 12 rounds under that rule was held by the WBC between Larry Holmes and Lucien Rodriguez.[9] The World Boxing Association, from which the World Boxing Organization had not yet separated, later followed suit[10] by voting to reduce their championship distances to 12 rounds on October 19, 1987.[11] While the International Boxing Federation, which had recently broken away from the WBA, continued to hold onto the position there was no documented medical evidence to show a 15-round fight is more dangerous than a 12-round fight, they eventually voted to shorten their championship distance to 12 rounds as well on June 3, 1988.[12]
Floyd Mayweather Jr. vs. Conor McGregor Floyd Mayweather Jr. vs. Conor McGregor, also known as "The Money Fight"[2] and "The Biggest Fight in Combat Sports History",[3] was a professional boxing match between undefeated eleven-time five-division boxing world champion Floyd Mayweather Jr. and two-division mixed martial arts (MMA) world champion and at-the-time current UFC Lightweight Champion Conor McGregor. The match took place at the T-Mobile Arena in Paradise, Nevada, on August 26, 2017 at the light-middleweight weight class (154 lbs; 69.9 kgs). It was scheduled for twelve rounds.