2025 U.S. NATIONAL CHAMPIONSHIPS
- Tuesday, June 3 – Saturday, June 7, 2025
- Indianapolis, Indiana
- Indiana University Natatorium
- LCM (50 meters)
- World Championship Selection Criteria
- SwimSwam Preview Index
- Meet Central
- Psych Sheets (Updated 6/02)
- Live Results
- How To Watch (USA Swimming Network)
- Prelims Live Recap: Day 1 | Day 2 | Day 3 | Day 4
- Finals Live Recap: Day 1 | Day 2 | Day 3
After shattering the American Record in the 500 freestyle during the NCAA season, Rex Maurer was expected to make a splash in the long course pool. He met, and even exceeded those expectations tonight with a U.S. Open Record in the 400 freestyle to win the event at Nationals.
Maurer posted a time of 3:43.33, smashing his personal best of 3:46.52 with his performance. In the process, he also took down Larsen Jensen‘s longstanding U.S. Open Record of 3:43.53, set back at the 2008 Olympic Trials. His time also makes him the 3rd-fastest American in history, only behind Peter Vanderkaay (3:43.11) and Jensen (3:42.78), with both swimmers setting their best times at the 2008 Olympic Games.
Top 5 All-Time US Performers – Men’s 400 Freestyle
- Larsen Jensen – 3:42.78 (2008 Olympic Games)
- Peter Vanderkaay – 3:43.11 (2008 Olympic Games)
- Rex Maurer – 3:43.33 (2025 US National Championships)
- Conor Dwyer – 3:43.42 (2016 Olympic Games)
- Connor Jaeger – 3:43.79 (2016 Olympic Games)
In terms of worldwide ranking, Maurer now ranks 2nd in the world this season behind German Lukas Märtens, who set a new World Record earlier this season with a 3:39.96. With Märtens as the heavy favorite in Singapore, Maurer will certainly be in the conversation for a medal if he can repeat that performance.
2024-2025 LCM Men 400 Free
MÄRTENS
WR 3:39.96
| 2 | Rex MAUER | USA | 3:43.33 | 06/06 |
| 3 | Oliver KLEMET | GER | 3:43.40 | 04/12 |
| 4 | Samuel SHORT | AUS | 3:43.84 | 04/04 |
| 5 | Florian WELLBROCK | GER | 3:45.29 | 04/12 |
In addition to the 400 freestyle, Maurer is slated to swim the 4×200 freestyle relay in Singapore after finishing 3rd in the 200 freestyle (1:45.13). His final event of the Championships will be the 800 freestyle on Saturday, where he is seeded 3rd overall (7:51.19).
Didn’t Klemet go 3:42 this year? So Mauer is #3
When Mauer goes out fast
It’s very interesting that Maurer is still solidly behind Marchand in the 500 but seemingly well ahead of him in the 400 – is there a 3:41 for Marchand or is his 500 just all underwaters and his actual freestyle swimming isn’t quite there?
The latter
Maurer will have to be 3.41 if he wants a medal in Singapore …. at least.
Thanks, you’re good at math.
For the rest of us, we’re kinda excited about the emergence of the best young middle-D tandem in USA history.
Well the article says he’ll be in the conversation for a medal if he repeats today’s performance.
That American record’s days are numbered.
holy moly
Misspelled his name in the list.
Congrats Rex my friend well deserved! Luka just became the youngest swimmer to qualify for a Worlds team since MP (younger than Heilman) wild times indeed