Raleigh, North Carolina: Reigning world indoor 400 metres gold medallist Debbie Dunn has withdrawn from the US world outdoor championship team with an unspecified injury, USA Track and Field (USATF) said on Monday.
USATF spokeswoman Jill Geer said she had no additional information on the injury and neither Dunn nor her agent could be reached for comment.
The announcement came as the United States finalised its team for the August 27 to September 4 world championships in Daegu, South Korea.
Former US 100 metres champion Mike Rodgers remained on the team pending a hearing on his positive test for a stimulant, officials said.
The fourth-fastest sprinter in the world this year, he was selected in the 100 metres and 4x100 relay.
Rodgers' agent told Reuters on Saturday the sprinter had tested positive for the stimulant methylhexaneamine after mistakenly consuming an energy drink that contained the banned substance.
His second or ‘B' sample is scheduled for testing on Wednesday.
An arbitration panel will determine his eligibility for the world championships.
