"This decision was not an easy one for me to make, as boxing is all I have done since I was a child," said Mayweather, the son and nephew of three of the sport's top trainers. "However, these past few years have been extremely difficult for me to find the desire and joy to continue in the sport."
Mayweather announces retirement
Mayweather, the WBC welterweight champion, made the announcement
in a letter to select media members Friday. The 31-year-old former
U.S. Olympian (39-0, 25 KOs) hasn't fought since beating Ricky
Hatton in December, but was widely expected to fight Oscar De La
Hoya in September in a rematch of the richest fight in boxing
history.