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]