By Nicole Miller on SwimSwam
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 3After 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
LukasGERMÄRTENS04/12WR 3:39.962RexMAUERUSA3:43.3306/063OliverKLEMETGER3:43.4004/124SamuelSHORT AUS3:43.8404/045FlorianWELLBROCKGER3:45.2904/12View Top 26»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).
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