Career Highlights: The four-time national champion will become the first U.S. boxer in history to compete in three Olympics but remains in search of his first victory in a Summer Games bout. It might have been deemed acceptable to lose his opener in Athens, considering he was the youngest boxer at the 2004 Olympics at the age of 17 and fell to the eventual bronze medalist. However, dropping a controversial one-point decision in his Beijing opener in 2008 certainly was a major disappointment being he was among the favorites as the reigning world champion. His performance at the 2011 Worlds wasn’t quite as good, claiming bronze just as he did in 2005, but it was good enough to secure a berth to London. Warren earned his spot at the Worlds with a dominant performance at the U.S. Olympic trials - none of his four bouts were decided by fewer than nine points. He also dominated his class at the 2010 Police Athletic League national championships, taking his four bouts by a combined 69-17 score to claim the title not long after winning the national Golden Gloves tournament. Warren did not compete at the 2011 U.S. championships after winning the event for the fourth time in 2010, when he stopped two opponents and won his other two fights by double-digit margins. It was a bit of revenge for Warren, who suffered a controversial semifinal loss at the 2009 nationals - an event he won in 2005, 2006 and 2007. It seems all but a certainty he’ll finally go pro after these Olympics after making the surprise decision to remain an amateur after each of the last two Summer Games.