Aaron Peirsol created the biggest buzz at the Indiana University Natatorium pool by reclaiming his world record in the 100 backstroke. The Olympic champion trailed Matt Grevers at 50 meters before pouring it on down the stretch to win in 51.94 seconds.

Dana Vollmer, a 2004 Olympian, won the women’s 200 freestyle in 1:56.20. Ariana Kukors from Auburn was third in 1:58.28.

Hayley McGregory ended years of bitter disappointment with a victory in the 100 backstroke. Margaret Hoelzer, who trained in Seattle for last year’s Olympics, was third.