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Gay from the US reacts after the men's 100m final during the 15th IAAF World Championships at the National Stadium in Beijing

Tyson Gay from the U.S. reacts after the men's 100m final during the 15th IAAF World Championships at the National Stadium in Beijing, China August 23, 2015. REUTERS/Lucy Nicholson

U.S. sprinter Tyson Gay

After a lackluster performance at the 2008 Beijing Olympics, American sprinter Tyson Gay will be looking for redemption on the track at the London Games. -- By Armando Botello II