Due a very disappointing sprain and fall at the U.S Olympic Trials (video below), Tyson Gay did not qualify for the 200 meters in Beijing. Gay is the defending world champion in the 200 and would have been the favorite in Beijing. An MRI has revealed a mild strain in Tyson Gay's left hamstring, and he has been advised to restrict his training for the next two weeks.
Before this incident Tyson Gay qualified for the Olympics by winning the 100-meter finals. He is also expected to participate in the 4x100m relay if he is healthy. At this point, Gay insists that he will be ready in August, saying that he'll "be 100 percent for the 100 and 400 relay".