Arguello by UD, No way he stops Marquez nobody hasn't done that, not even Mayweather who was almost at 154 at fight night could.:deal
Arguello was a more punishing hitter than Mayweather, and he also typically got more and more offensive as the rounds wore on. Mayweather did the opposite. Arguello was also an unforgiving finisher and would almost certainly follow up if he had JMM in trouble. I could see this fight ending inside schedule.