Luka Mijatovic Breaks Own 15-16 NAG With 3:45.30 400 Freestyle

2025 U.S. OPEN

Men’s 400 Freestyle – Finals

  • World Record: 3:39.96 – Lukas Martens, Germany (2025)
  • U.S. Open Record: 3:43.33 – Rex Maurer, USA (2025)
  • Meet Record:  3:45.63 – Zane Grothe, 2016

Top 8 Finishers

  1. Leon Marchand(TXLA) — 3:44.70
  2. Luka Mijatovic (PLS) — 3:45.30
  3. Carson Foster (UN) — 3:45.73
  4. Luke Hobson (NYAC) — 3:45.85
  5. Aaron Shackell (IU) — 3:47.93
  6. Ilia Sibirtsev (UZB) — 3:48.98
  7. Luke Whitlock (IU) — 3:48.99
  8. Jordi Vilchez (OSU) — 3:51.49

Luka Mijatovic broke his own 15-16 National Age Group (NAG) record with a 3:45.30 400 freestyle en route to a 2nd place finish. That broke his own record of a 3:45.71 that he swam for 2nd at 2025 US Summer Nationals.

Split Comparison

Distance (m)
New NAG Record
Old NAG Record
50 25.85 25.85 26.15 26.15
100 28.09 53.94 28.18 54.33
150 28.76 1:22.70 28.57 1:22.90
200 28.67 1:51.37 28.77 1:51.67
250 29.05 2:20.42 28.96 2:20.63
300 28.72 2:49.14 28.75 2:49.38
350 28.79 3:17.93 28.74 3:18.12
400 27.37 3:45.30 27.59 3:45.71

Mijatovic was out under his old record from the start and saw the biggest difference on his first and last 50s as his first and last 50 totaled a difference of -0.52 seconds.

With his swim tonight, he moves up one spot to be the #13 American in the event all-time as he passed Jake Mitchell who had a best time of a 3:45.38. He already is the fastest 18 and under ever for the US as the 17-18 NAG stands at a 3:46.01.

Nine of the top 16 swimmers in the event will have been Texas/Longhorn Aquatics swimmers in some point in their careers at Mijatovic, the top ranked recruit for 2027, committed to Texas at the end of October. Leon Marchand, Carson Foster, and Luke Hobson all train out of Texas currently.

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19 Comments
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BR32
5 months ago

Best collegiate Texas swimmer isn’t even at Texas yet

swim2
Reply to  BR32
5 months ago

Rex Maurer?

sjostrom stan
Reply to  BR32
5 months ago

weird way to spell Kos

Eddie
5 months ago

Wait Jake Mitchell went 3:45.38?? When

Justin Pollard
Reply to  Eddie
5 months ago

Olympics

Admin
Reply to  Eddie
5 months ago

Prelims at the Tokyo Olympics

Andre
5 months ago

3:42 WJR next summer mark it

Tex
Reply to  Andre
5 months ago

Or this summer…

Danantara
Reply to  Andre
5 months ago

The true WJR is 3:41.83

The Albatross
Reply to  Andre
5 months ago

Nope Danantara, the true WJR is 3:40.59 !

popvicioverpan
5 months ago

I’m calling it. he’s breaking the WJR before he goes to highschool.

Red Hill
Reply to  popvicioverpan
5 months ago

He’s almost 17 and not in high school? You can graduate school at 17 in Australia (I graduated with a 16 year old in my year)

just a guy
Reply to  Red Hill
5 months ago

he’s in high school this dude is just confusedf

breastroke supporter
Reply to  popvicioverpan
5 months ago

does that includes building the time machine?

Danantara
Reply to  popvicioverpan
5 months ago

He’s not in high school at already 16??

KeithM
5 months ago

Hopefully he will drop another pb in the 200.

Swimfanjacoby
5 months ago

I think he had more to give, but ppl acting like dropping half a second means hes washed, like what? He might be like a little tapered rn but he notmally does better end of ssn idk about the wjr this year but in two years??? I think he will be 3:43 befoe he turns 18 so idk about it I would just say i think he could have gone faster in the middle with his closing 50

Last edited 5 months ago by Swimfanjacoby
what are we doing here??
5 months ago

#slow #swimfaster #sixsecondsoffworldrecordgetfasterbuddy

justkeepswimming
Reply to  what are we doing here??
5 months ago

he’s 16, not 26.

About Anya Pelshaw

Anya Pelshaw

Anya has been with SwimSwam since June 2021 as both a writer and social media coordinator. She was in attendance at the 2022, 2023, 2024, 2025, and 2026 Women's NCAA Championships writing and doing social media for SwimSwam. She also attended 2023 US Summer Nationals as well as the 2024 …

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