World record-holder Summer McIntosh fails to qualify for 400m freestyle final at Pan Pacific swim meet

Summer McIntosh, the world record-holder in the women’s 400-metre freestyle, missed qualifying for Friday evening’s A final at the Pan Pacific Swimming Championships in Irvine, Calif.

In position to finish second to Australia’s Lani Pallister in a morning heat, McIntosh was narrowly beaten to the wall, placing third and ninth overall in four minutes 8.56 seconds, 14 seconds over her record time. China's Fan Yaqi, 15, grabbed the eighth and final spot for the 10:07 p.m. ET final in 4:08.36.

The 19-year-old Canadian star from Toronto says she'll swim in the B final at 10:01 p.m. along with teammate Ella Cosgrove, who was 13th overall.

"I take full responsibility for my misjudgment in this morning's heats," McIntosh wrote on Instagram. "I will see you all in the B final tonight and thank you for your support."

Summer McIntosh fails to qualify for 400m freestyle final at Pan Pacific swimming champions

Last June, McIntosh set the new record of 3:54.18 at the Canadian swimming trials in Victoria, eclipsing the mark set by the now-retired Ariarne Titmus (3:55.38) of Australia in 2023 at the world championships in Fukuoka, Japan.

Friday’s A final outdoors at William Woollett Jr. Aquatics Center was being billed as a battle between American record-holder Katie Ledecky, Pallister, and McIntosh.

Ledecky was tops in qualifying in 4:03.48 while Pallister was fourth (4:05.22).

McIntosh sets women's 400m freestyle world mark at 2025 Canadian trials

McIntosh made her Pan Pacs debut Wednesday in the women’s 200 free and took silver in 1:53.86, nearly 2-10ths behind Pallister, who clocked a championship record 1:53.67.

The Canadian followed with a pair of medals Thursday, shattering the championship record in the 400 individual medley with a 4:28.01 clocking. She also teamed with Mary-Sophie Harvey, Emma O’Croiniin and Brooklyn Douthwright to take bronze in the women’s 200 free relay.