i re-watched the Baldomir fight (don't ask me why), and well there were moments that Baldomir would corner Mayweather and do nothing but swing wildly and miss pretty much everything, given this, i'd say that Cotto in the future would have a decent chance in beating Mayweather, i mean Cotto is efficient and effective with his punches, he puts his combos together better and is a genius in working the body, plus he IMO has better hand speed and power than Baldomir, combined with an iron will and heart, and constant pressure he could seriously push Mayweather in the not too distant future, but right now, i think Mayweather would beat him by decision