OK ... say the various sanctioning bodies didn't overreact (IMHO) to Duk Koo Kim's death and change the championship distance in the 80s; which fights since then might have been affected by the fighters having to go another three rounds? Who was saved by not having to last nine more minutes? Who lost because they didn't have another three rounds to eke out a decision or KO? First vote: Hagler/Leonard. Ray was pretty gassed by the end of the fight ... would he have paced himself differently over a longer distance? Possibly; but I don't think it would have mattered. After the layoff and lacking a tune-up fight, his legs would have slowed considerably. Just my .02 ...
Can't think of anyone offhand who might have won. Sure there were a couple, but the main difference is there probably would have been more kos of guys who lost a decision.
Marciano would have lost v Walcott in a 15, as would leonard v hearns 1.would have been interesting to see result if leonard v hearns 2 had been a 15 rounder.
I've always hated the change from 15 to 12 rounds. 1) fighters pace themselves different in a 12 round title fight. 2) You may have examples for me but how major damage/deaths of a fighter can truly be attributed to the extra three rounds? 3) They used to call rounds 13-15 the "championship rounds"! Not anymore.... I always liked the format in the old days: 10 rounds if the fighters were moving close to contender status. 12 rounds if you've got two top contenders in an eliminator to a title shot. 15 rounds for all the marbles! My $0.02
Chavez vs Taylor wouldn't have been controversial, Hagler probably catches Leonard, Leonard likely stops Hearns in the 2nd fight. There are more, but those are the ones that pops in my mind immediately.
"Main event...15 rounds ...for the Heavyweight Championship Of The World!!!"...God I miss those days!!!
Even though he technically won Felix Trinidad would have in my opinion stopped Oscar DelaHoya or knocked him down and delivered some punishment those last 3 rounds. Oscar was gassed and he didn't have another 3 rounds of running in him. I think it would have eliminated the controversy and feeling of dissatisfaction we had after that bout was over.
Fights like Louis-Conn 1, Marciano-Walcott 1, Leonard-Hearns 1, etc..having different winners if scheduled for 12 rounds is all speculation since fighters pace themselves differently and react differently knowing there are less rounds left in the fight. I don't really know how they would go. I do think that Chavez-Taylor 1 would have been controversy-free if scheduled for 15 and Chavez would stop Taylor late. Taylor was winning by outworking Chavez but taking hard shots throughout the fight. I don't think that changes if scheduled for 15. Taylor was winning largely by his insane workrate and speed, not a more "pure boxing" performance like Whitaker where he used all sorts of brilliant angles to avoid blows. The punishment was adding up, Taylor suffered a cut inside his mouth in the 2nd round when JCC landed a right hand over Taylor's left, then a short left hook inside. I think Weaver-Tate would probably have ended different if scheduled for 12. It didn't seem like Weaver turned up the pace in the 15th, knowing he had 1 round left. Tate just got a little careless by going back to the ropes, Weaver went to the body with the right, then landed a left hook bomb upstairs to win.
Howard Davis jr. would have decisioned Edwin Rosario, and Thrilla in Manilla coul have ended in a draw. But 15 rounds is definitely the best. But TPTB wanted it their way, and they ruined boxing.