U.S. gymnast Hamm retires associated press Copyright 2012 associated press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Published 08:58 p.m., Tuesday, March 27, 2012 The only American man to win a world or Olympic all-around title told the Associated Press on Tuesday that he is retiring. Hamm returned in the summer of 2010, hoping to end his career with a positive Olympic experience after a judging controversy spoiled his Olympic title in 2004 and a freak injury forced him out of Beijing. In addition to his 2003 world and 2004 Olympic titles, he led the Americans to a silver medal in Athens, their first at the Olympics in 20 years, and was the cornerstone of silver medal teams at the 2001 and 2003 world championships.