FILE - In this Aug. 12, 2008, file photo, United States' Rau'shee Warren removes his headgear after losing a decision to South Korea's Lee Ok-sung in a men's flyweight 51-kilogram preliminary boxing match at the 2008 Beijing Olympics, in Beijing. Three months after that defeat, Warren again proved his independence when he decided to become the first three-time Olympian in U.S. boxing history when he competes in the 2012 London Olympics. (AP Photo/Murad Sezer, File)