The distance (boxing) 19, 1987. 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. The last heavyweight 15-rounder title fight was on October 16, 1987 between Mike Tyson and Tyrell Biggs. The last middleweight 15-rounder title fight was a World Boxing Board title match on June 7, 1997 in which Jose Alfredo Flores won a split decision over
Boxing on CBS number of their championship fights to 12 rounds. It was also the last fight to air as part of strike replacement programming on CBS because of the NFL strike, which ended three days later. A then 14-0 Oscar de la Hoya appeared on a December 10, 1994 card for CBS. The last time CBS aired a live boxing event prior to 2012, was on January 20, 1997, when then-middleweight champion Bernard Hopkins knocked out Glen Johnson in the 11th round. Boxing on CBS CBS has occasionally broadcast boxing events; its first broadcast occurred in 1948. The network's most recent broadcasts