Caeleb Dressel reacts after winning the men's 50 freestyle during wave 2 of the U.S. Olympic Swim Trials on Sunday, June 20, 2021, in Omaha, Neb. (AP Photo/Jeff Roberson)

Caeleb Dressel rparticipates in the men's 50 freestyle during wave 2 of the U.S. Olympic Swim Trials on Sunday, June 20, 2021, in Omaha, Neb. (AP Photo/Jeff Roberson)

Simone Manuel reacts after the women's 50 freestyle during wave 2 of the U.S. Olympic Swim Trials on Sunday, June 20, 2021, in Omaha, Neb. (AP Photo/Charlie Neibergall)

Caeleb Dressel reacts after winning the men's 50 freestyle during wave 2 of the U.S. Olympic Swim Trials on Sunday, June 20, 2021, in Omaha, Neb. (AP Photo/Jeff Roberson)

Simone Manuel and Abbey Weitzeil react after the women's 50 freestyle during wave 2 of the U.S. Olympic Swim Trials on Sunday, June 20, 2021, in Omaha, Neb. (AP Photo/Jeff Roberson)

Simone Manuel and Abbey Weitzeil react after the women's 50 freestyle during wave 2 of the U.S. Olympic Swim Trials on Sunday, June 20, 2021, in Omaha, Neb. (AP Photo/Jeff Roberson)

Nathan Adrian congratulates Caeleb Dressel after the men's 50 freestyle during wave 2 of the U.S. Olympic Swim Trials on Saturday, June 19, 2021, in Omaha, Neb. (AP Photo/Charlie Neibergall)

Simone Manuel reacts after the women's 50 freestyle during wave 2 of the U.S. Olympic Swim Trials on Sunday, June 20, 2021, in Omaha, Neb. (AP Photo/Charlie Neibergall)

Bobby Finke gets a hug from his mother Jenny Finke after winning the men's 1500 freestyle during wave 2 of the U.S. Olympic Swim Trials on Sunday, June 20, 2021, in Omaha, Neb. (AP Photo/Jeff Roberson)

Simone Manuel reacts after the women's 50 freestyle during wave 2 of the U.S. Olympic Swim Trials on Sunday, June 20, 2021, in Omaha, Neb. (AP Photo/Charlie Neibergall)

Simone Manuel reacts at the medal ceremony for the women's 50 freestyle during wave 2 of the U.S. Olympic Swim Trials on Sunday, June 20, 2021, in Omaha, Neb. (AP Photo/Charlie Neibergall)

Bobby Finke reacts after winning the men's 1500 freestyle during wave 2 of the U.S. Olympic Swim Trials on Sunday, June 20, 2021, in Omaha, Neb. (AP Photo/Charlie Neibergall)

Simone Manuel and Abbey Weitzeil react after the women's 50 freestyle during wave 2 of the U.S. Olympic Swim Trials on Sunday, June 20, 2021, in Omaha, Neb. (AP Photo/Jeff Roberson)

Bobby Finke reacts after winning the men's 1500 freestyle during wave 2 of the U.S. Olympic Swim Trials on Sunday, June 20, 2021, in Omaha, Neb. (AP Photo/Jeff Roberson)

FILE - In this Friday, Aug. 9, 2019 file photo, Nathan Adrian of United States competes in men's swimming 50m freestyle at the Pan American Games in Lima, Peru. Adrian is competing in the Olympic trials in Omaha, Neb., Sunday, June 13, 2021 (AP Photo/Fernando Llano, File)

Simone Manuel reacts after winning the women's 50 freestyle during wave 2 of the U.S. Olympic Swim Trials on Sunday, June 20, 2021, in Omaha, Neb. (AP Photo/Jeff Roberson)

Simone Manuel and Abbey Weitzeil ccelebrate at the medal ceremony after the women's 50 freestyle during wave 2 of the U.S. Olympic Swim Trials on Sunday, June 20, 2021, in Omaha, Neb. (AP Photo/Jeff Roberson)

Simone Manuel and Abbey Weitzeil hug after the women's 50 freestyle during wave 2 of the U.S. Olympic Swim Trials on Sunday, June 20, 2021, in Omaha, Neb. (AP Photo/Jeff Roberson)