Simone Manuel participates in the women'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)

Abbey Weitzeil laughs with Simone Manuel, right, after competing in a women's 50-meter freestyle preliminary heat during wave 2 of the U.S. Olympic Swim Trials on Saturday, June 19, 2021, in Omaha, Neb. (AP Photo/Charlie Neibergall)

Katie Ledecky congratulates Katie Grimes after the women's 800 freestyle during wave 2 of the U.S. Olympic Swim Trials on Saturday, June 19, 2021, in Omaha, Neb. (AP Photo/Jeff Roberson)

Abbey Weitzeil participates in the women's 50 freestyle during wave 2 of the U.S. Olympic Swim Trials on Saturday, June 19, 2021, in Omaha, Neb. (AP Photo/Jeff Roberson)

Katie Ledecky congratulates Katie Grimes after the women's 800 freestyle during wave 2 of the U.S. Olympic Swim Trials on Saturday, June 19, 2021, in Omaha, Neb. (AP Photo/Jeff Roberson)

Katie Ledecky and Katie Grimes on the podium at the medal ceremony for the women's 800 freestyle during wave 2 of the U.S. Olympic Swim Trials on Saturday, June 19, 2021, in Omaha, Neb. (AP Photo/Charlie Neibergall)

Abbey Weitzeil after the women's 100 freestyle during wave 2 of the U.S. Olympic Swim Trials on Friday, June 18, 2021, in Omaha, Neb. (AP Photo/Charlie Neibergall)

Katie Ledecky participates in the women's 800 freestyle during wave 2 of the U.S. Olympic Swim Trials on Saturday, June 19, 2021, in Omaha, Neb. (AP Photo/Charlie Neibergall)

Phoebe Bacon reacts after finishing second in the women's 200 backstroke during wave 2 of the U.S. Olympic Swim Trials on Saturday, June 19, 2021, in Omaha, Neb. (AP Photo/Jeff Roberson)

Caeleb Dressel participates in the men's 100 butterfly during wave 2 of the U.S. Olympic Swim Trials on Saturday, June 19, 2021, in Omaha, Neb. (AP Photo/Jeff Roberson)

Caeleb Dressel reacts after winning the men's 100 butterfly during wave 2 of the U.S. Olympic Swim Trials on Saturday, June 19, 2021, in Omaha, Neb. (AP Photo/Jeff Roberson)

Phoebe Bacon wins her heat in the women's 200 backstroke during wave 2 of the U.S. Olympic Swim Trials on Friday, June 18, 2021, in Omaha, Neb. (AP Photo/Charlie Neibergall)

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)

Katie Ledecky reacts after the women's 800 freestyle during wave 2 of the U.S. Olympic Swim Trials on Saturday, June 19, 2021, in Omaha, Neb. (AP Photo/Charlie Neibergall)

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/Jeff Roberson)

Simone Manuel reacts after the women's 50 freestyle during wave 2 of the U.S. Olympic Swim Trials on Saturday, June 19, 2021, in Omaha, Neb. (AP Photo/Jeff Roberson)