Dana Vollmer is the fastest qualifier in the 100-meter freestyle preliminaries at the U.S. Olympic swim trials, with teenager Missy Franklin also advancing.
Vollmer was timed in 54.35 seconds for the two-lap sprint on Friday morning. Allison Schmitt, who is having one of her best meets ever, was second at 54.49.
Jessica Hardy, who failed to qualify for the Olympic team in the 100 breaststroke, had the third-fastest time of 54.52. Franklin was seventh in 54.78.
Natalie Coughlin, yet to secure a spot on her third Olympic team, finished ninth at 54.99. She will need to be faster in the evening semifinal to advance to the eight-woman final on Saturday.
Two-time Olympian Kara Lynn Joyce failed to make the semifinals in 18th, while 2008 Olympian Christine Magnuson tied for 22nd.