Who do you think it was? Currently I think Beterbiev can go through the 12 rounds pressing at a great pace. On a historical or general level, who do you have?
It’s why I cannot understand his effort against Spinks. Especially seeing his effort against Holyfield a few years later. He might have taken that fight if he hadn’t had 3 rounds off for no reason early on in the fight. It was kind of close anyway even though Qawi was pedestrian.
From memory Spinks buckled him early with a right hand and that seemed to make Qawi cautious early on as Spinks controlled the fight with his jab which was excellent that night Qawi as you said got back into it late on but too little too late. I believe I scored it 144-140 I'd have to look at my scorecard.
Well, looking at achievement alone, Victor Galindez went 15 rounds 9 times and 12 or better another 9 times. I’d say that was pretty damning evidence.
If I had to pick one guy, I’d go with Matthew Saad Muhammad. He fell behind in so many fights to come back so strong in the later rounds. He was able to recover from beatdowns and being within an inch of being stopped more than once, which to weather such storms takes a lot of stamina. And he always seemed like the stronger guy the longer the fight went on.
Not the most stamina in history but a guy worth mentioning; Old Pops. He worked almost like Joe Frazier in there. He worked 3 minutes per round and it started at the opening bell. Such a tough pace is bound to be draining especially adding the absorption factor of the clean punches he took. But he sure knew where the gas pedal was, didn't he? Who else was going to fight at that pace?
A case could be made for Tommy Loughran. Watching the two or three round footage of his fight with Leo Lomski, he looked as fresh in the fifteenth round as the first.
Greb and Qawi are two obvious and worthy shouts I've read. Of those not yet cited on this thread, admittedly better known as a SMW and a MW, respectively, but both contested fights at LHW, Joe Calzaghe and Teddy Yarosz each had insanely good engines.
I was gonna mention Calzaghe, but see you beat me to it. Joe could throw punces almost non stop for 12 rounds - and at the end looked like he could go another 12. Truly amazing engine!