SPORTS: The Champ | Floyd "Money" Mayweather for ESPN Magazine: mayweather_0007

LAS VEGAS, NV - AUGUST 10: With temperatures in the gym exceeding 100 degrees, boxer Floyd Mayweather hits the heavy bag during practice. He throws about 8,000 punches per workout. (Photo by Benjamin Lowy/Reportage by Getty Images)

LAS VEGAS, NV - AUGUST 10: With temperatures in the gym exceeding 100 degrees, boxer Floyd Mayweather hits the heavy bag during practice. He throws about 8,000 punches per workout. (Photo by Benjamin Lowy/Reportage by Getty Images)