Imagine shattering a swimming record that has stood untouched for over two decades – that's the kind of historic moment that gets your heart racing! In an electrifying display at the 2025 U.S. Open, young swimmer Luka Mijatovic did just that, eclipsing Larsen Jensen's 23-year-old National Age Group (NAG) record in the 15-16 category for the 800-meter freestyle with a blazing 7:48.28. If you're new to swimming jargon, an NAG record is like a benchmark for swimmers in specific age groups, showcasing the pinnacle of performance for kids turning 15 or 16 that year – it's a big deal because it highlights emerging talent before they hit the senior ranks.
But here's where it gets controversial: Is it fair to compare records from different eras, when training methods, technology, and even pool designs have evolved so much? Some fans argue that modern swimmers have an edge with better gear and science-backed coaching, while others say raw talent and dedication still shine through. Stick around as we dive deeper into this story – you might rethink what makes a 'record' truly legendary.
The event unfolded from December 3-6, 2025, at the impressive Lee and Joe Jamail Texas Swimming Center in Austin, Texas. It was held in a long-course meter (LCM) pool, measuring 50 meters, which is standard for international competitions and requires swimmers to adapt to those longer distances compared to shorter, indoor pools. Preliminaries kicked off at 10 a.m. EST each day, with finals typically at 7 p.m. EST – though Day 1 had an earlier start at 5 p.m. EST. For live updates, check out the Meet Central page at https://www.usaswimming.org/event/2025/12/03/default-calendar/toyota-us-open, the psych sheets (a preview of predicted performances) at https://swimswam.com/wp-content/uploads/2025/11/25tuso-psych-sheet.pdf, and real-time results via https://www.omegatiming.com/2025/2025-toyota-u-s-open-championships-live-results. Recaps are available for finals on Day 1 (https://swimswam.com/2025-u-s-open-day-1-finals-live-recap/), Day 2 (https://swimswam.com/2025-u-s-open-day-2-finals-live-recap/), Day 3 (https://swimswam.com/2025-u-s-open-day-3-finals-live-recap/), and Day 4 (https://swimswam.com/2025-u-s-open-day-4-finals-live-recap/), plus prelims for Day 2 (https://swimswam.com/2025-u-s-open-day-2-prelims-live-recap/), Day 3 (https://swimswam.com/2025-u-s-open-day-3-prelims-live-recap/), and Day 4 (https://swimswam.com/2025-u-s-open-day-4-prelims-live-recap/).
Focusing on the men's 800-meter freestyle timed finals, it's worth noting some key benchmarks to put performances in context. The world record stands at 7:32.12 by Zhang Lin of China back in 2009, while the U.S. Open record is 7:40.34, held by American Bobby Finke since 2023. The meet-specific record for this event is 7:47.27, set by Chad La Tourette of the USA in 2009. These figures help beginners understand just how competitive the 800 free is – it's an endurance test where pacing and strategy are as crucial as speed.
The top eight finishers in this race were dominated by impressive talents, with Luka Mijatovic (representing PLS, and tagged at https://swimswam.com/tag/luka-mijatovic/) claiming first place in 7:48.28. Close behind was Ilia Sibirtsev of Uzbekistan in 7:51.85, followed by Luke Whitlock from Indiana University (IU) at 7:54.66, Carson Foster from UN-MR at 7:55.51, Bobby Finke (SPA-FL, bio at https://swimswam.com/bio/bobby-finke/) at 7:57.68, Ivan Puskovitch from TSM at 7:59.45, Charlie Clark from Ohio State University (OSU) at 8:02.42, and Aiden Hammer from Texas (tagged at https://swimswam.com/tag/aiden-hammer/) rounding out the list at 8:05.07.
Mijatovic's victory didn't just secure gold; it smashed the long-standing 15-16 NAG record previously held by Larsen Jensen (https://swimswam.com/tag/larsen-jensen/), who clocked 7:52.05 at the 2002 Pan Pacific Championships. For context, Jensen was a prodigy in his time, and his mark lasted through countless meets and technological advancements – until now. Mijatovic improved his own personal best by a full five seconds, a huge leap that shows how much he's grown. If you're wondering what that means practically, dropping five seconds in an 800-meter race is like shaving off significant time per lap, often through better technique or increased fitness, and it's a game-changer for young athletes aiming for the Olympics.
And this is the part most people miss – the split comparison reveals the nitty-gritty of his strategy. Splits are the times for each 50-meter segment, letting us see if a swimmer maintains pace or surges late. Here's how Mijatovic's splits compared between the 2025 U.S. Open and his performance at the 2025 U.S. Summer Nationals (where he went 7:53.80):
At 50 meters: 26.78 (both events)
At 100 meters: 28.89 (Open) vs. 29.29 (Nationals), totaling 55.67 vs. 55.86
At 150 meters: 29.40 (Open) vs. 29.68 (Nationals), totaling 1:25.07 vs. 1:25.54
At 200 meters: 29.49 (Open) vs. 29.76 (Nationals), totaling 1:54.56 vs. 1:55.30
See AlsoAlison Kos' Powerful Message: Overcoming Sibling Pressure in SportsIrish Swimmers Shine in Lublin: Walshe, Shortt, McCartney, and Corby AdvanceU.S. Open Night 4 Scratches: Germonprez, Gemmell, Andrew End Meets Early | 2025 Swimming RecapCSCAA Dual Meet Challenge 2025: UVA vs MICH Men & ASU vs TENN Women - Battle for 3rd PlaceAt 250 meters: 29.48 (Open) vs. 30.00 (Nationals), totaling 2:24.04 vs. 2:25.30
At 300 meters: 29.25 (Open) vs. 29.77 (Nationals), totaling 2:53.29 vs. 2:55.07
At 350 meters: 29.59 (Open) vs. 30.18 (Nationals), totaling 3:22.88 vs. 3:25.25
At 400 meters: 29.54 (Open) vs. 29.98 (Nationals), totaling 3:52.42 vs. 3:55.23
At 450 meters: 29.65 (Open) vs. 30.15 (Nationals), totaling 4:22.07 vs. 4:25.38
At 500 meters: 29.75 (Open) vs. 29.95 (Nationals), totaling 4:51.82 vs. 4:55.33
At 550 meters: 29.87 (Open) vs. 30.38 (Nationals), totaling 5:21.69 vs. 5:25.71
At 600 meters: 29.96 (Open) vs. 30.07 (Nationals), totaling 5:51.65 vs. 5:55.78
At 650 meters: 29.72 (Open) vs. 30.43 (Nationals), totaling 6:21.37 vs. 6:26.21
At 700 meters: 30.00 (Open) vs. 29.57 (Nationals), totaling 6:51.37 vs. 6:55.78
At 750 meters: 29.38 (Open) vs. 29.82 (Nationals), totaling 7:20.75 vs. 7:25.60
At 800 meters: 27.53 (Open) vs. 28.20 (Nationals), final time 7:48.28 vs. 7:53.80
The standout difference? Mijatovic kept nearly every split under 30 seconds this time, barring the 30.00 at 700 meters, and unleashed a powerful finish with a 27.53 on the last 50 meters – over half a second faster than before. For beginners, this highlights how 'charging home' means using reserves for a final burst, often deciding races. Compared to his nationals swim, he was consistently quicker early on, building a lead that he maintained to the end. Experts might point out this shows improved aerobic capacity, but could it also hint at tactical adjustments under pressure?
Thanks to this stellar swim, Mijatovic climbed to #12 on the all-time list of American performers in the men's LCM 800 free, jumping from outside the top 25. This ranking includes elite names like Bobby Finke at #1 with 7:38.67 from the 2023 World Championships. To give you a fuller picture, here's the full top 12 (all in LCM):
Bobby Finke, 7:38.67 — 2023 World Championships
Michael McBroom, 7:43.60 — 2013 World Championships
Zane Grothe, 7:43.74 — 2018 Pan Pacific Championships
Connor Jaeger, 7:44.26 — 2013 World Championships
Luke Whitlock, 7:45.19 — 2024 Olympic Trials
Jordan Wilimovsky, 7:45.19 — 2018 Pan Pacific Championships
Larsen Jensen (https://swimswam.com/tag/larsen-jensen/), 7:45.63 — 2005 World Championships
Chad La Tourette, 7:46.52 — 2011 World Championships
Peter Vanderkaay, 7:46.64 — 2011 World Championships
Ross Dant, 7:48.10 — 2023 Phillips 66 National Championships
David Johnston, 7:48.20 — 2024 World Championships
Luka Mijatovic (https://swimswam.com/tag/luka-mijatovic/), 7:48.28 — 2025 U.S. Open
This leap is remarkable for someone still in the NAG category – it begs the question: Should age group achievements carry as much weight as senior records, especially when young stars like Mijatovic are already rubbing shoulders with Olympic-level swimmers? Some might argue it's inspiring for kids, while detractors say it dilutes the prestige of elite lists. What do you think – is Mijatovic's rise a sign of the next big thing, or does mixing youth and veteran performances complicate how we celebrate swimming milestones?
Finally, a quick note on the reporter: Anya Pelshaw (bio at https://swimswam.com/bio/anya-pelshaw/) has been a dedicated part of SwimSwam since June 2021, handling writing and social media. She covered the 2022, 2023, 2024, and 2025 Women's NCAA Championships on-site, plus the 2023 U.S. Summer Nationals and 2024 European Championships. Her firsthand experience makes stories like this come alive – you can read more about her at the link above.
There you have it – a record-smashing swim that rewrites history and sparks debate. Do you agree that breaking an old NAG record like Jensen's is more thrilling than just beating a personal best? Or perhaps you see it differently – maybe modern training gives an unfair advantage? Share your thoughts in the comments below – I'd love to hear if you side with the traditionalists or the innovators in this swimming saga!
