4 × 100 m medley relay, mixed

What to remember

Two men, two women, in whatever order the team picks: that is the rule for mixed relays. On August 12, 2026, at the Pan Pacific Championships in Irvine, United States, the American quartet covered the mixed 4 × 100 m medley relay in 3 min 36.70 s.

The order of strokes, on the other hand, is fixed: backstroke goes first, because that leg starts in the water. The Americans gave the first two legs to the men. Will Modglin swam backstroke in 53.40 and Van Mathias breaststroke in 57.30. The women took over from there: Gretchen Walsh on butterfly in 54.99, then Kate Douglass on freestyle in 51.01, the fastest of the four legs.

Like every swimming world record, this one is ratified by World Aquatics, formerly FINA. In the 4 × 100 m medley relay, all three long course records belong to the United States: men, women and mixed.