EUGENE, Ore. — Tyson Gay got quite a fright in his first race today. He set a record in his second.

Gay broke Maurice Greene's American mark in the 100 meters by running 9.77 seconds in his quarterfinal at the U.S. Olympic track and field trials.

"It tells me I'm in pretty good shape," Gay said. "We've got two more rounds left."

The U.S. contingent for the women's 100 was determined Saturday, and the biggest surprises might have been who did not make the team: Allyson Felix, whose specialty is the 200 but announced her intention to compete in four events in China, and Marshevet Hooker, who had the fastest time in each of the previous three rounds.

But Hooker was fourth and Felix was only fifth in the final. Instead, the three roster spots in that event went to Muna Lee in 10.85, and Torri Edwards and Lauryn Williams, two past world champions who both finished in 10.90.

"I'm definitely disappointed," Felix said. "The whole reason for running the 100 is to make the team. But I can't get too down. I still have the 200 to go."