Rigo v Donaire Rigo was rumored to be around 125 while Donaire was low 140s fight night if I remember correctly. Donaire looked huge compared to Rigo.
Leonard-Lalonde? I know Bob Fitzimmons was outweighed 14lbs and about 3-4 shorter than Corbett. Marciano also faced someone humoungous much bigger than himself and stopped him too. Duran-Barkley too.