タイソン・ゲイ
In Gatlin's absence, the United States team was led by Tyson Gay, the reigning world champion, but who had suffered a hamstring injury at the U.S. trials. An ascendant Jamaican team included Powell, who had held the world record from 2005 to 2008, and Usain Bolt, who had taken the world record in May of 2008.