Luka Mijatovic Breaks His Own 15-16 NAG Record in the 400 Freestyle

2025 TYR Pro Swim Series — Westmont

Luka Mijatovic finished 4th in the men’s 400 freestyle tonight, swimming 3:48.95 to break his own 15-16 National Age Group Record in the 400m freestyle by a little under three tenths of a second.

Men’s 400 Freestyle – Final

  • World Record: 3:40.07 – Paul Biedermann, GER (2009)
  • World Junior Record: 3:44.31 – Petar Mitsin, BUL (2023)
  • American Record: 3:42.78 – Larsen Jensen (2008)
  • U.S. Open Record: 3:43.53 – Larsen Jensen, USA (2008)
  • Pro Swim Record: 3:43.55 – Sun Yang, CHN (2016)

Final: 

  1. Sam Short (AUS), 3:44.83
  2. Carson Foster (RAYS), 3:46.42
  3. Guilherme Costa (SESC), 3:46.74
  4. Luka Mijatovic (PLS), 3:48.95
  5. Aiden Hammer (KING), 3:51.35
  6. Ryan Erisman (LAKR), 3:52.30
  7. Stephan de Freitas Steverink (FRJ), 3:52.64
  8. Ilia Sibirtsev (UZB), 3:52.80

Mijatovic is only 15-years-old and he has already broken the 15-16 NAG record twice, first setting it back in August when he went 3:49.24 at the Junior Pan Pacific Championships. He also holds the 13-14 NAG record in the event.

His swim tonight marks his first time under 3:49, coming in at 3:48.95. While he is still two years away from even being eligible to break the record, he is now less than three seconds away from the 17-18 record of 3:46.08 set by Larsen Jensen back in 2004.

When he broke the record back in August, he became the only 15-16 year-old swimmer to go under 3:50 in the event coming in ahead of Larsen Jensen‘s 22 year old record of 3:50.68. He only further expanded the gap between him and the next closest swimmer ever with his swim tonight.

Top Five 15-16 Performers in History:

  1. Luka Mijatovic– 3:48.95 (2025)
  2. Larsen Jensen– 3:50.68 (2002)
  3. Norvin Clontz- 3:50.82 (2022)
  4. Jake Magahey- 3:51.38 (2018)
  5. Dare Rose- 3:51.41 (2018)

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Anonymous
1 day ago

how does he drop at every meet

maheny
Reply to  Anonymous
1 day ago

youth

Konner Scott
1 day ago

Very, very impressive. What was Thorpe at 15? (Just curious; not trying to trivialize Luka’s swim)

PhillyMark
Reply to  Konner Scott
1 day ago

He won Worlds in 1998 w 3:46.29 when he was 15 (and 3 months) years of age

M d e
Reply to  PhillyMark
1 day ago

In briefs.

Beach Boy
Reply to  Konner Scott
1 day ago

3:44.35

Aquatic Ursine
Reply to  Konner Scott
1 day ago

How rude, you’re comparing a swimmer to Thorpe, what an insult

Washed up
1 day ago

Under 3:50 before you can drive yourself to practice is crazy.

EverybodyWangChungTonight
1 day ago

And another one

Martigues Lover
1 day ago

Sigma sigma bly sigma boy sigma boy

PFA
1 day ago

Yeah he’s making the trials final this year

CraigH
1 day ago

I remember Larsen’s first Mile swim. He went a 17:30, and later that summer he went a 16:30. By the next summer we went to Western Zones and he went like 8:05 in the 800. The Progression was crazy.