A prime Castillo could have taken that shot. He looked quite fleshy in the Hatton fight and he was moving up away from his best division. He had weight trouble in the last two Corrales fights and he wasn't himself in the fight before Hatton. If we had a prime v prime fight i think it would be a real brutal affair and i have to say it would be a coin toss as to whom would come out victorious. 100% it would go longer than 4 rounds tho.