Why? I doubt Shane could of stayed 135 for much longer than Floyd could of at 130, both were too big for the weight. Neither are logical questions.
He should have stayed at lightweight and he'd be known as the greatest eva! and one of the most exciting fighters, cause at 135 he could bang. He'd clown Duran at 135 the way SRL did at a higher weight class. Duran had trouble with crafty, fast fighters.