Tough to call. Cotto hurt him the most no doubt. The judah fight, shoulda been Unanimous, not split, Judah had Corley hesitant and in survival mode by the end. Mayweather, aside from bein rocked big time, dominated the whole damn fight. From what I heard of the Witter fight, up till the 10th round then I had to go pick up my little brother from the bus stop, Corley had won AT LEAST 4 rounds, and that's from the bias UK announcers point of view. So I'd have to say Mayweather did the best, then Cotto, then a tossup between Zab and Witter, maybe with an edge to Witter. But let's remember this UK fans, Corley was not the same man who first fought Judah, and Mayweather, or even Cotto. Just as Ben Tackie was not the same man who fought Tzyu or Mitchell by the time Hatton faced him. Its the truth.