IRVINE, CALIFORNIA - AUGUST 12: Reo Miura of Team Japan competes in the Men's 100m Backstroke Heats on Day 1 of the Pan Pacific Swimming Championships at William Woollett, Jr. Aquatics Center on August 12, 2026 in Irvine, California. (Photo by Maddie Meyer/Getty Images)

IRVINE, CALIFORNIA - AUGUST 12: Rylee Erisman of Team United States competes in the Women's 100m Backstroke Heats on Day 1 of the Pan Pacific Swimming Championships at William Woollett, Jr. Aquatics Center on August 12, 2026 in Irvine, California. (Photo by Maddie Meyer/Getty Images)

IRVINE, CALIFORNIA - AUGUST 12: Rylee Erisman of Team United States competes in the Women's 100m Backstroke Heats on Day 1 of the Pan Pacific Swimming Championships at William Woollett, Jr. Aquatics Center on August 12, 2026 in Irvine, California. (Photo by Maddie Meyer/Getty Images)

IRVINE, CALIFORNIA - AUGUST 12: Rylee Erisman of Team United States competes in the Women's 100m Backstroke Heats on Day 1 of the Pan Pacific Swimming Championships at William Woollett, Jr. Aquatics Center on August 12, 2026 in Irvine, California. (Photo by Maddie Meyer/Getty Images)

IRVINE, CALIFORNIA - AUGUST 12: Rylee Erisman of Team United States competes in the Women's 100m Backstroke Heats on Day 1 of the Pan Pacific Swimming Championships at William Woollett, Jr. Aquatics Center on August 12, 2026 in Irvine, California. (Photo by Maddie Meyer/Getty Images)

IRVINE, CALIFORNIA - AUGUST 12: Gretchen Walsh of Team United States competes in the Women's 50m Butterfly Heats on Day 1 of the Pan Pacific Swimming Championships at William Woollett Jr. Aquatics Center on August 12, 2026 in Irvine, California. (Photo by Maddie Meyer/Getty Images)

IRVINE, CALIFORNIA - AUGUST 12: Gretchen Walsh of Team United States competes in the Women's 50m Butterfly Heats on Day 1 of the Pan Pacific Swimming Championships at William Woollett Jr. Aquatics Center on August 12, 2026 in Irvine, California. (Photo by Maddie Meyer/Getty Images)

IRVINE, CALIFORNIA - AUGUST 12: Matthew Galea of Team Australia looks on after competing in the Men's 800m Freestyle Heat 1 on Day 1 of the Pan Pacific Swimming Championships at William Woollett, Jr. Aquatics Center on August 12, 2026 in Irvine, California. (Photo by Sean M. Haffey/Getty Images)