Aaron Pryor's stamina Arturo Gatti's heart Mike Tyson's killer instinct RJJ's speed Hagler's work ethic
Suprised nobody has mention Ali yet. Amazing hand speed for a heavyweight and very quick feet in his prime. His abilty to also withstand punishment was also freakish.
Bob Fitzsimmons was always mentioned for his freakish build, which is not all that noticeable in my judgement in the scant surviving film. This is from the SF Chronicle, 6-7-1899 "He has the look of two men of different build joined together at the waist. His legs look like parlor tongs and he has the chest and arms of Hercules. The length of his legs and arms give him a most peculiar appearance, and when he humps his back, lowers his head, extends his arms, sprawls his legs out and goes into action, he looks like a big mosquito."
Barbados Joe Walcott is the freakiest of them all, especially when you consider the fact that he was just half an inch over 5 feet tall and weighed 138 pounds, had freakishly long arms and heavyweight power, knocking out heavyweights. Imagine if he was 6 feet tall, how devastaing he'd be, I couldn't even imagine.
Panama Al Brown was a real freak of nature. He was the World Bantamweight champ from 1929-1935. The man was 6 feet tall and was a BANTAMWEIGHT . He also had a 76 inch reach, more than some heavyweights! The guy looked like a malnourished, famine victim but the fact was he had unbelievable stamina as evidenced by the large amount of decision wins he racked up, many going the 15 round distance.
Panama Al Brown. He was World Bantamweight champ from 1929-1935. This man was 6 feet tall and had a 76 inch reach as a BANTAMWEIGHT(119 lbs)! He looked like a malnourished, famine victim, but the man has unbelievable stamina, as evidenced by the number of decision victories he had in a career that consisted of 155 bouts, many of those decision victories going the full 15 rounds.
Apart from that, he had a granite chin, which is very unusual for a tall, lanky, skinny fighter, and Brown was probably the skinniest and lankiest of them all. The very definition of a Freak of Nature. Thomas Hearns looked like a freak, he was 6'1'' and had a 78' reach. Imagine a bantamweight one inch shorter with a wingspan just two inches shorter.
How about Joe Choynski's power? Many who fought both him and Fitz said Joe clearly hit harder, impossible as that might seem. Super Flyweight's Akeem Anifowoshe's height. He was massive.