Examples of fighters who hit the wall in terms of size?

Vasily Jirov at HW. Moorer.
Haye and Toney were somewhat limited at HW and couldn't deal with Klitschko type of boxer.

 

Fatass Dillianabol Whyte.

 

Julio César Chávez was never really any good above 140 because he could not hurt them and was usually warped

 

Arthur Abraham 168

 

Glen Johnson although he was on the wrong side of a fair few robberies

 

He had decent success at 168. It came later though.

 

De La Hoya at 160

 

Roman Gonzalez at super fly

 

True and indeed almost half of his career was effectively at the weight.

However, he wasn't the undefeated wrecker that he was at MW, he also had 6 losses and never again achieved the status as boogeyman that he held at MW. At MW it wasn't a stretch to consider him a top 3ish guy, at SMW I don't really consider him ever being higher than maybe 6ish.....I think he was just too small to compete, he was in a bad place, too big for MW but too small for SMW

 

Jerry Quarry would have been a world champion at Cruiserweight had the division existed during his prime. He was just to small to compete with the top guys at heavyweight like Ali and Frazier.

 

Honestly I feel like the Cruiserweight divison has quite few guys like Jirov, Gomez, DeLeon, Orlin Norris etc. That were excellent at Cruiserweight but once they chased the big dollars at 200+ they found themselves outgunned.

Cruiserweight is kind of a no man's land when you think about it. Pretty big gap from 175 to 200 pounds for those guys mentioned above.

 

Nonito Donaire

 

Haye is one of the most overrated fighters in history. beat one decent fighter at cw, a bunch of nobodies at hw.