Quote Originally Posted by Jimanuel Boogustus View Post
Of course it does. That's why we have weight classes.

Heavyweights are the oddity because there is no upper limit. Honestly there is reasonable logic that the 230+ mob should be in a class of their own.
This. Since boxing is divided into weight classes, fighters are facing opponents of roughly similar size. Size matters a lot more in other sports. Basketball and height, for example.

Outside of the HW division, I'm not sure how meaningful the "size matters" argument is. Maybe it explains an outlier like Hearns at welter, specifically his 1-punch KO ability, but even then he lost to the smaller SRL.

But going back to the HW division, I not sure how determinate a factor size is. That's because extremely large boxers tend to lack coordination. That's why Primo Carnera couldn't just walk over Joe Louis. Mike Tyson routinely KOed much larger men, as his power was generated by a speed and movement that larger men usually don't have and can't react fast enough to.