Did mayweather really win......

[Hulk]

yeah, it was a close and competative fight, and castillo probably did enough to get the w. I think that it was the worst performance of PBF's career, everyone has offnights, and he proved that in the rematch. If they did it for a third time, Floyd would win again. I dont think it is fair to say Floyd has problems against pressure fighters off of this one performance, because he has beaten several good pressure fighters.

Who?

Well Jesus Chavez and Gatti off the top of my head. Corrales and N'dou too somewhat, although they are very different from Castillo and Hatton.

Corrales isn't a true pressure fighter, but fair enough. Chavez...eh...I didn't see the fight, but he is mostly a pressure fighter. Gatti was a pressure fighter but did not use pressure to fight Floyd, he stayed out in the center of the ring and paid for it dearly.