Whose fought the best vs Mayweather in his career?

Emanuel burton

 

:good first time I seen mayweather. Great fight. He also cut Floyd.

 

I still feel to this day that Castillo won his first fight against floyd. the judges were impressed by floyds flash and didn't give castillo proper credit for the body work he put in.

 

Emmanuel Augustus made Floyd work the hardest. Floyd was getting hit clean all fight, he threw about 80 punches a round and seemed to get a bit tired during th fight. I've never seen Floyd remotely tired in any other fight. Now he did win the very round and eventually stopped Augustus, but I think Augustus made him work harder than anyone else.

 

Castillo I
(gap)
Castillo II
Oscar
Maidana I
(gap)
Cotto
Judah
(gap)
Mosley - funny that a guy who lost 10 or 11 rounds put up the 7th best fight
Carlos Hernandez
Hatton
Chavez

Alvarez/Corley/Maidana II show up in the next tier.

Marquez/Baldomir/Pacquiao/Guerrero/Sharmba/Bruseles, as far as his career above 130 lbs, represent the bottom tier of putting up the best fights against Floyd.