To become an ATG, I think Cotto would have to do more than beat Mayweather and unify the titles. He'd need to clean out the rest of the division's B+, B, B- level guys (De La Hoya, Quintana/Williams, Berto, Clottey, Collazo, Nuzhnenko as a mandatory). If he racked up multi digit title defenses, while winning in dominating fashion, he'd have himself a quality welterweight reign. I'm skeptical of Cotto's chances at 154. He could probably beat a few top 10 guys, but without the ability to impose his strength against bigger men, he'd have to rely more of technical ability and defense. Perhaps he could pick up a title belt against a decent opponent in the future, but if I had a say, I'd keep him at 147 for a long time. A lot of people thought he was just another action fighter in the mold of Gatti, but I stayed patient as well, waiting for him to move up to 147 where my hopes were that the added weight would help him to take shots better. I'd say my hopes have been realised; some of the shots that Judah and Mosley hit him with would have taken him out had it been the 140 pound version. No, simply because he's small, has defensive liabilities, doesn't have an iron chin, and also because the welterweight division is so rich in talent when you look back on it. A TKO victory over Mayweather wouldn't get me to change my outlook on fights with Robinson, Leonard, Gavilan, Napoles, Griffith, Hearns, Duran, and Benitez. Those guys were on another level - a level we probably won't see against in quite some time. Even lesser guys in Trinidad, De La Hoya, and Quartey would still present massive stylistic disadvantages for Cotto. It's unreasonable to expect him to be remembered as one of the best H2H welterweights ever. Do you have a top 100 list?