He fought Canelo Alvarez at a catchweight of 152 .
Mayweather 's weight class is 147 pounds , but he has competed twice at the junior middleweight limit of 154 to face Oscar De La Hoya and Miguel Cotto .
Mayweather fought Canelo Alvarez at a catchweight of 152 .
Mayweather 's weight class is 147 pounds , but he has competed twice at the junior middleweight limit of 154 to face Oscar De La Hoya and Miguel Cotto .