Carmelita Jeter, the reigning women's 100m world champion, won't compete at the US athletics championships as she nurses a right thigh injury but will still be eligible to defend her title.
Jeter, who won the world title in Daegu, South Korea, in 2011 and took silver in the 100m at last year's London Olympics, hasn't run since she pulled up late in finishing third at the Shanghai Diamond League meeting on May 18.
Because she is injured, Jeter will still be eligible to use her wild card as reigning champion at the World Championships in Moscow, even without competing at the US trials, a USA Track and Field spokesperson said.
Jeter owns a personal best of 10.64sec in the 100m, making her the second-fastest woman in history behind Florence Griffith-Joyner, who set the world record of 10.49 in 1988.
At last year's London Olympics, she also claimed a 200m bronze and gold as she anchored the world record-breaking US 4x100m relay.
The women's 100m at the US championships, selection meeting for the World Championships in Moscow August 10-18, lost another big name before Thursday's heats as Allyson Felix withdrew, apparently opting to focus her attention on regaining her 200m world title in Moscow.