IRVINE, CALIFORNIA - AUGUST 12: Regan Smith of Team United States competes in Heat 4 of the Women's 100m Backstroke 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)

IRVINE, CALIFORNIA - AUGUST 12: Will Modglin of of Team United States competes in Heat 3 of the Men's 100m Backstroke 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)

IRVINE, CALIFORNIA - AUGUST 12: Brittany Castelluzzo of of Team Australia looks on after competing in the Women's 200m Butterfly 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)

IRVINE, CALIFORNIA - AUGUST 12: Will Modglin of of Team United States looks on after competing in Heat 3 of the Men's 100m Backstroke 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)

IRVINE, CALIFORNIA - AUGUST 12: Rex Maurer of Team United States looks on after competing in Heat 5 of the Men's 200m Freestyle 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)

IRVINE, CALIFORNIA - AUGUST 12: James Leigh of Team New Zealand looks on after competing in Heat 1 of the Men's 200m Freestyle 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)

IRVINE, CALIFORNIA - AUGUST 12: Luke Hobson of Team United States prepares to compete in Heat 5 of the Men's 200m Freestyle 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)

IRVINE, CALIFORNIA - AUGUST 12: Michael Andrew of Team United States competes in Heat 4 of the Men's 50 m Butterfly 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)