Maurice Greene will not compete in the 200m at this year's World Championhips after pulling out of the final at the US trials in Palo Alto.
Maurice Greene will still compete in the 100m at the world championships
The Olympic 100m champion had planned to take on both events in Paris in August.
But he was left limping after finishing fourth in an unimpressive semi-final display and withdrew from the final because of tendinitis in his right knee.
His coach, John Smith, said the decision was made after they learned Greene had been drawn in lane one for the final.
"If he had been in lane eight, it might have been different," said Smith.
"I looked at him and asked: 'Are you going to run the 200 in Paris'. He said 'probably not', so I said 'what are we doing here?'"
Darvis Patton took the 200m title in 20.15sec ahead of John Capel and J.J. Johnson.
Greene will still compete in the 100m in Paris because he is the three-time defending champion in that event.
Elsewhere, 36-year-old Gail Devers edged Miesha McKelvy-Jones by one-hundredth of a second to win her ninth national title in the 100m hurdles.
Sprint sensation Allyson Felix made the team by finishing third in the 200m in a time of 22.59 seconds, behind Kelli White and Torri Edwards.
Felix had to drive through the night on Friday to get to Palo Alto after graduating from Los Angeles Baptist High School.
The 17-year-old has the fastest time in the world this year with 22.11sec.
Marion Jones, who is missing from the trials as she is due to give birth in July, could soon be coached by Dan Pfaff, who previously worked with 1996 Olympic 100m champion Donovan Bailey.
Pfaff is reportedly close to agreeing a deal to coach both Jones and her partner Tim Montgomery, the 100m world record holder.