"Sugar" Shane Mosley (born September 7, 1971) is a boxer from Pomona, California. He has won world titles in three weight divisions and is the only boxer to date to have beaten Oscar de la Hoya twice.

As an amateur, Mosley was a three-time National champion and a runner up to become a member of the US boxing team in the 1992 Olympics, losing to Vernon Forrest. Overall, Mosley was 250-10 before turning pro in 1993.
Source : Wikipedia