What is Floyd Mayweather's best win?

[The Underboss]

Marquez .

[GunzNButter]

I think the Corley fight was his best win. He showed that he could deal with adversity and he was almost knocked out in that fight. Also was Brawling more than Boxing and that is unusual for PBF. I also like his wins against Diego and Gatti(May they both RIP)

[BritishBoxing92]

PBF's best win? Or his most-defining match?

Best win, I would say Diego Corrales and JLC.

And his most-defining match might have been Oscar.

Hatton,Delahoya and Diego corrales....about it really

[Dynamite Kid]

Look at it like this, many people think Castillo beat Mayweather, so who is the best fighter he fought?

[illmatickid]

Corrales, IMO.

I can see why some would say JLC. It's impressive that, after a very close fight, he gave the guy a rematch and beat him again in more convincing fashion. But the performance against Corrales was on another level.

WORD... exactly
and i would put those two wins over the win with oscar because oscar wasnt ranked as high as those two when floyd fought them.. however the fact that floyd did beat oscar and it was @ 154 is still very impressive