How many ko's does he have with it? I seem to remember people saying he was a one armed fighter before because he would only use his left hand. Am I wrong?
Most of the damage he inflected on David Diaz was with the right hand, although the finishing blow came courtesy of his left cross. He rocked Margarito late in their fight with the right hook. He also knocked Cotto down with the hook.
At 122 and 126 he could hurt his opponent so bad with 1 left that they could never recover the rest of the fight.