A bottle lies on the track behind the starting blocks after being thrown from the crowd as, from left, Jamaica's Usain Bolt, United States' Justin Gatlin, Jamaica's Yohan Blake, United States' Tyson Gay and Jamaica's Asafa Powell compete in the men's 100-meter final the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Sunday, Aug. 5, 2012. (AP Photo/Martin Meissner)
A bottle lies on the track behind the starting blocks after being thrown from the crowd as, from left, Jamaica's Usain Bolt, United States' Justin Gatlin, Jamaica's Yohan Blake, United States' Tyson Gay and Jamaica's Asafa Powell compete in the men's 100-meter final the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Sunday, Aug. 5, 2012. (AP Photo/Martin Meissner)
ASSOCIATED PRESS Sprinter Tyson Gay was sidelined for nearly a year after having surgery on his right hip in 2011.
ASSOCIATED PRESS Sprinter Tyson Gay was sidelined for nearly a year after having surgery on his right hip in 2011.
Sprinter Tyson Gay was sidelined for nearly a year after having surgery on his right hip in 2011. (Associated Press)
Tyson Gay leads in a men's 100m preliminary at the U.S. Olympic Track and Field Trials Saturday, June 23, 2012, in Eugene, Ore. (AP Photo/Marcio Jose Sanchez)
Tyson Gay crosses the finish line ahead of the pack during the 100-meter B race at the Adidas Grand Prix track and field meet on Randall's Island, Saturday, June 9, 2012, in New York. (AP Photo/Mary Altaffer)
Tyson Gay crosses the finish line ahead of the pack during the 100-meter B race at the Adidas Grand Prix track and field meet on Randall's Island, Saturday, June 9, 2012, in New York. (AP Photo/Mary Altaffer)
