Men's 400 IM - B Final
World Record: Leon Marchand, 4:02.50
American Record: Michael Phelps, 4:03.84
U.S. Open Record: Michael Phelps, 4:05.25
Meet Record: Leon Marchand, 4:07.80
2025 TYR Pro Swim Series Westmont:
Carson Foster, 4:09.51
2025 TYR Pro Swim Series Sacramento:
Michael Hochwalt, 4:16.88
Click on the athlete's name below to view their bio.
| Name | Prelims Time |
|---|---|
| David Sammons Lane 1 | 4:29.05 |
| Gregg Enoch Lane 2 | 4:28.57 |
| Jacob Turner Lane 3 | 4:28.31 |
| Erick Gordillo Lane 4 | 4:25.09 |
| Jackson Irwin Lane 5 | 4:26.39 |
| Wilson York Lane 6 | 4:28.31 |
| Gerhardt Hoover Lane 7 | 4:28.79 |
| Andrew Christensen Lane 8 | 4:29.08 |