Lets take a look at their resumes by the years:
2009
JMM
Juan Diaz TKO 9 - Knocked-out the no.1 in his division in his first defense of the lineal belt
Mayweather
Didn't fight
2008
JMM
Joel Casamayor TKO 11 - Knocked out 135lb kingpin Joel Casamayor who had never had been knocked out even when facing stonger punchers such as J. L. Castillo and D. Corrales
Manny Pacquiao II L SD 12 - Gave the current P4P King and future ATG hell for 12 rounds, many thought he won.
Mayweather
Didn't fight
2007
JMM
Rocky Juarez UD 12 - Stayed busy dominating the always durable challenger
Marco Antonio Barrera UD 12 - Barely beat fellow countryman in a tactical masterpiece
Mayweather
Ricky Hatton TKO 10 - First man to defear the tough brit in a somewhat sloppy fight
Oscar De La Hoya SD 12 - Barely beat the popular fighter in the riches fight in boxing history
2009
JMM
Juan Diaz TKO 9 - Knocked-out the no.1 in his division in his first defense of the lineal belt
Mayweather
Didn't fight
2008
JMM
Joel Casamayor TKO 11 - Knocked out 135lb kingpin Joel Casamayor who had never had been knocked out even when facing stonger punchers such as J. L. Castillo and D. Corrales
Manny Pacquiao II L SD 12 - Gave the current P4P King and future ATG hell for 12 rounds, many thought he won.
Mayweather
Didn't fight
2007
JMM
Rocky Juarez UD 12 - Stayed busy dominating the always durable challenger
Marco Antonio Barrera UD 12 - Barely beat fellow countryman in a tactical masterpiece
Mayweather
Ricky Hatton TKO 10 - First man to defear the tough brit in a somewhat sloppy fight
Oscar De La Hoya SD 12 - Barely beat the popular fighter in the riches fight in boxing history
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