Where did you get this info from? I don't remember their fight weights being shown on HBO, but I remember Gatti saying he expected to weigh 155 on fight night. I always wondered what fighters' weights were on fight night when they weren't released (PBF's fights with DLH and Hatton, Cotto-Mosley, etc...)
Calzaghe fought people from the pensioners fight club , whilst Mayweather Jr fought guys at the top in there prime !