Olympic and world champion Gatlin also ran 9.77 in Doha on 12 May this year.
"I felt like I had a pretty good start, and I brought it home pretty good, " Gatlin said.
Gatlin took longer than any other athlete on his victory lap, stopping frequently to sign autographs and pose for pictures.
This time it's the boy who's the mortal: moody, bookish Ethan, the outsider in his sleepy small town of Gatlin, S.C.
CNN: Review: 'Beautiful Creatures' lacks danger and momentum
Gatlin, the 2005 world 100m and 200m champion, gave a positive test for testosterone at the low-level Kansas Relays in April 2006.
BBC: Gatlin won the 100m title at the Athens Olympics in 2004
The Bush guest list has included country singer Larry Gatlin, pro golfer Ben Crenshaw, Michigan Gov. John Engler and songwriter Kinky Friedman.
Gatlin won the 100 meters at the Diamond League meet in a wind-aided time of 9.88 seconds, besting fellow Americans Michael Rodgers and Ryan Bailey.
He revealed how an encounter with U.S. sprinter Justin Gatlin, who served a four-year doping ban between 2006 and 2010, influenced his approach to racing.
"There was a little distraction, " said American bronze medalist Justin Gatlin.
Bolt's reaction time was typically slow, with Gatlin, Blake and Gay faster out of the blocks, but the legs in lane seven were starting to drive.
The 2004 Olympic champion Justin Gatlin, also from the U.S., is returning after a doping ban while fellow Jamaican Asafa Powell once held the world record himself.
But Usada, in exchange for Gatlin agreeing to cooperate with its anti-doping campaign and in recognition of the exceptional circumstances of his first failure, imposed an eight-year ban.
BBC: Gatlin won the 100m title at the Athens Olympics in 2004
Gatlin could press his case to the IAAF that an earlier doping violation in his career should not be counted against him and his ban should be reduced.
BBC: Gatlin won the 100m title at the Athens Olympics in 2004
Gatlin won the Olympic gold medal at the Athens Games but his promising career was derailed in 2006 by a positive drug test that led to a four-year ban.
But if the appeal is successful it could clear the way for Gatlin to receive a two-year ban for the 2006 test and become eligible to compete in May, a month ahead of the US Olympic trials for the Beijing Games.
BBC: Gatlin won the 100m title at the Athens Olympics in 2004
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