In this photo taken Thursday, April 14, 2015, Floyd Mayweather Sr., right, watches his son boxer Floyd Mayweather Jr., left, work out in Las Vegas. He taught his son to throw punches before he could walk, and he'll be in his corner for the biggest fight of his life against Manny Pacquiao on May 2. The relationship between Mayweather Sr. and his son, though, hasn't always been good. (AP Photo/John Locher)