At 140 there might be a slight worry in regard to stamina due to Mayweather having physically developed his body over the past several years to fight at the welterweight limit, but at ~143+ there shouldn't be any issue whatsoever.
He walks around at the welter limit, so that makes him a welterweight in my eyes.
Agreed.
But his huggers always say he's a small Welterweight (which he is), whenever anybody discusses matching him up against someone in his own division. Especially the taller men like Williams, and Margarito.
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