IRVINE, Calif. -- Tom Shields broke the U.S. Open meet record in the 100-meter butterfly, finishing in a personal-best 51.65 seconds Thursday.
Shields, sixth at 50 meters, swam a 27.05 on the final length at William Woollett Jr. Aquatic Center to take the title. He had the fastest time of the year by an American and fourth-best in the world.
"It's been a tough couple of months with the transition from (college to professional swimming) and I feel like this swim was me teaching myself how to handle a different kind of pressure," said Shields, the Huntington Beach swimmer who was competing in front of many family members and friends. "I used to practice in this pool, so to do this in my own community feels great."
Tim Phillips was second in 51.78.
Felicia Lee won the women's race in 58.94. Australia's Christina Licciardi followed in 59.27.
In the women's 400 individual medley, Australia's Keryn McMaster won in 4:39.97, and Celina Li was second in 4:39.47. On the men's side, Sebastien Rousseau of South Africa set a U.S. Open meet record at 4:11.11, the fourth-best time in the world this year. Gunnar Bentz was second in 4:15.81.