With what is left at welterweight Mosley is PBF's toughest challenge. I think Cotto may be considered better at welterweight but Mosley would be a better fight. I hope Cotto does win because that would Mosley's only real chance at PBF in the near future. If Pac wins there is no doubt that PBF/Pac is boxing's biggest money fight and money rules boxing so Mosley best be a sparring partner, running mate, trainer, etc. for Cotto. Because Pac has to lose for Mosley to have a chance at fighting PBF next. Cotto would probably have a slight better chance if he won but I think the bad blood would sell better and finally push Mosley in that spot.