Originally Posted by Ovid***ile
Sayers versus Heenan is actually a bad reference to site for your point. True, Sayers has some reputation as a middleweight giant killer fighting heavyweights but John C. Heenan only had four formal fights losing two and drawing one with Sayers. That means out of his four total fights he only won once. Hardly a victory worth crowing about for a true professional boxer such as Sayers was. Then the fight ended in the forty second round after supporters of Sayers rushed the ring when Heenan looked to be getting the upper hand. If he gained a draw it's against a lowly near amateur opponent, but it looks like he might have been on his way to a loss.
Tom Sayers' victory over William Perry who had about 11 fights, mostly wins, was 6' 1/2" tall, 185 pounds, and 38 years old is somewhat more impressive. At least Perry had a winning record, even if he was old.
In general terms, the best LPR fighters seem to have been about the same size as Rocky Marciano.
There were guys around the size of Foreman and even Lewis, but it is hard to be sure whether they did not get to the top because their size did not suit them to the rule set, or simply because they were not very good.