By Mark Wild on SwimSwam
2025 U.S. Summer Championships
Tuesday, August 5 – Friday, August 8, 2025 Irvine, California William Woollett Aquatics Center Start Times Prelims: 9:00 am local / 12:00 pm ET Finals: 5:00 pm local / 8:00 pm ET LCM (50 meters) Meet Central Psych Sheets Live Results Live Stream Info (Available on USA Swimming Network App) Live Recaps Prelims: Day 1 | Day 2 Finals: Day 1 | Day 2Day 3 Prelims Heat Sheet
We are exactly halfway through the 2025 US Summer Championships as the 3rd of four days is about to get underway. Strap in folks as we are set to undergo the longest preliminary session so far of the meet as it’s projected to last a whooping 1 hour and 21 minutes. Over the course of the hour and a third we are scheduled to get through eight events, four each for the women and men.
Day 3 Prelims Schedule:
Women’s 100 Free Men’s 100 Free Women’s 400 IM Men’s 400 IM Women’s 50 Fly Men’s 50 Fly Women’s 100 Back Men’s 100 BackHunter Armstrong will need all of that time and maybe more as the 24-year-old is scheduled to compete in three of the four men’s events on tap this morning, sparing himself from having to swim the 400 IM. Armstrong is the top seed in the men’s 100 free where he is joined by Brooks Curry with seed times under 48, with the pair entered at 47.59 and 47.96 respectively. The pair, along with #3 seed Grant House will be looking for a time that earns them a spot on the Pan-Pacs roster, with that 6th fastest time resting at 47.92.
Armstrong is also slated to compete in 50 fly and 100 back, which are the last two events in the session. Seeded 22nd in the 50 fly with a yards entry, Armstrong will have just over 15 minutes between that event and the 100 back, where, like in the 100 free he is seeded first, with a time of 52.72. He along with the #2 seed Adam Chaney will be chasing the 52.54 and 52.94 put up by Will Modglin and Daniel Diehl at the World University Games, as they are the top two fastest Americans in line for a Pan-Pacs roster spot.
Armstrong is seeded to swim in the final heat of the 50 fly, where the top seed and American Record holder Caeleb Dressel is slated to take to lane 4. Dressel finished 3rd in the 50 free on night 1, but did not take to the blocks yesterday in the 100 fly. The only other men’s event on the day sees Louisville’s Tommy Bried as the top seed at 4:15.01 but has Kieran Smith hot on his heels at 4:15.10 and the two time Australian Olympian Se-Bom Lee not far back as the 4th seed at 4:18.37.
However, before all of these events occur, we kick things off with the women’s 100 free, where top seed Claire Weinstein will be making her individual debut. Weinstein led off the Sandpipers of Nevada 4×100 free relay last night in 55.11, trailing both Jaimie de Lutiis (54.54) and Rachel Bockrath (54.87). The pair are both in this morning’s prelim as well, with the Australian de Lutiis, the #2 seed and Bockrath, the 1oth. Joining them in the prelims are the #3 and #4 seeds Kristina Paegle and Bella Sims.
Sims scratched out of the next event, the 400 IM, where she was seeded dangerously low with a yards entry. Justina Kozan, who has been having a good run of form, will look to continue her success as she is the top seed by nearly a second over Australia’s Kayla Hardy. The pair are joined by Indiana Swim Club’s Reese Tiltmann as the only entrants under 4:45.
The women’s 50 fly, like the men’s is a USA vs Australia showdown. While in the men’s event its Dressel looking to hold off the Australian Hunter Armbruster, the women’s event sees top seed Isabella Boyd of Australia look to fend off Baily Hartman and Rachel Klinker. The final event of the women’s side is representative of the state of the 100 back at Worlds where its going to be atrong fight between the Americans and Australians. The US have the advantage here in Irvine as top seeds Rhyan White and Erika Pelaez are both seeded under a minute while Australia’s Alyssa Burgess and Layla Day are a little back at 1:00.51 and 1:00.58.
WOMEN’S 100 FREE — Prelims
World Record: 51.71 – Sarah Sjöström, SWE (2017) American Record: 52.04 – Simone Manuel, (2019) U.S. Open Record: 52.43 – Torri Huske, USA (2025) World Junior Record: 52.70 – Penny Oleksiak, CAN (2016) Pro Swim Series Record: 52.74 – Siobhán Haughey, HKG (2024)Top 8
Jaimie De Lutiss – 54.65 Bella Sims – 54.68 Erika Pelaez – 55.01 Alex Shackell – 55.09 Chloe Stepanek -55.18 Madi Mintenko/Eloise Riley – 55.25 Rachel Bockrath – 55.31With just three heats and therefore all of them circle-seeded in the women’s 100 free, things got off to a very fast start. 6th seed Erika Pelaez took the win from the first heat in a time of 55.01, .24 ahead of Eloise Riley. Pelaez trailed the top seed in the heat Kristina Paegle at the 50 turn, 26.78 to 26.59, but past her in the last 50 with Paegle fading to 4th in the heat with a time of 55.82, over a second off her seed of 55.35.
The 2nd heat saw a trio emerge as the early leaders with Jaimie De Lutiis opening in 26.33 just ahead of Chloe Stepanek and Alex Shackell, who flanked the #2 seed in lanes 5 and 3 respectively. Stepanek, back by at the 50 by just .03 tried to keep up with the Australian, but de Lutiis and Shackell, 26.38 at 50, were strong on the back end. De Lutiis, pulled away from Shackell as well closing in 28.32 to touch the wall in 54.65, the first sub-55 time of the morning. Shackell, a Paris Olympian in the 200 fly, finished .9 ahead of Stepanek, 55.09 to 55.18.
The final heat saw no swimmer in lane 4 as top seed Claire Weinstein did not take to the block. The Singapore Worlds medalist had previously scratched two events on the previous days but did compete in the relay last night. In her absence, her clubmate, Bella Sims won the heat with a time of 54.68. Her time puts her just .03 back of de Lutiis but the pair split it very differently with Sims out in 26.59 but back in 28.09, the fastest in the field. On the back 50 Sims put distance between herself and the early leader Madi Mintenko, who was 26.55 and 28.70 to finish in 55.25.
MEN’S 100 FREESTYLE – Prelims
World Record: 46.40 – Pan Zhanle (2024) American Record: 46.81 – Jack Alexy, (2025) U.S. Open Record: 46.99 – Jack Alexy, USA (2025) World Junior Record: 46.86 – David Popovici, ROU (2022) Pro Swim Series Record: 48.00 – Nathan Adrian, USA (2016)Top 8
Brooks Curry – 48.35 Jerry Fox – 48.94 Julian Koch – 49.08 Dylan Smiley – 49.25 Marco Antonio Ferreira – 49.30 Grant House – 49.35 Jack Dahlgren – 49.64 Ahmed Ismail – 49.69The first heat saw some excitement as Thomas Nowakowski swimming out of lane 6 blasted his was to a very big lead as he hit the 50 wall at 22.06. The Australian made it very obvious he was going for a 50 time as he closed in 33.90 to finish dead last at 55.96. The attempt seemed worth it however as was much faster than his 22.35 and 22.67 from the 50 free prelims and finals. Passing a relaxed Nowakowski on the last 50 to take over the lead was the #6 seed overall Dylan Smiley of Indiana Swim Club who was out in 23.60 and closed in 25.65 to stop the clock at 49.25. Grant House and Jack Dahlgren finished close behind at 49.35 and 49.64.
The middle of three heats, saw two time Olympian Brooks Curry open in 22.97, nearly half a second faster then Marco Antonio Ferreira’s 23.37. Curry continued his blistering pace closing in 25.38 to be the first swimmer under 49 as he stopped the clock in 48.35. Jerry Fox, back by .70 of a second a the 50 turn, closed the gap by .11 to also get under 49 as he hit the wall in 48.94, a new PB by .08.
With the top and fourth seeds Hunter Armstrong and Jamie Jack not taking to the blocks in the final heat, only five swimmers dove into the water. The 400 Free winner from last night, Aaron Shackell was the lone swimmer in the heat to open in under 24, as he flipped in 23.92, however his distance pedigree was not enough to hold off the sprint for the finish as Julian Koch of the University of Pittsburgh and Ahmed Ismail of Ohio State both passed Shackell on the backhalf. Koch touched first at 49.08, coming home the fastest in the field (25.07) while Ismail splits 25.66 to stop the clock in 49.69 to grab the last spot in the A-final. Shackell’s 50.05 was 10th fastest overall.
WOMEN’S 400 INDIVIDUAL MEDLEY – Prelims
World Record: 4:23.65 – Summer McIntosh, CAN (2025) American Record: 4:31.12 – Katie Hoff, (2008) U.S. Open Record: 4:26.98 – Summer McIntosh, CAN (2025) World Junior Record: 4:24.38 – Summer McIntosh, CAN (2024) Pro Swim Series Record: 4:26.98 – Summer McIntosh, CAN (2025)Top 8
Justina Kozan – 4:45.15 Reese Tiltmann – 4:49.53 Kayla Hardy – 4:49.65 Summer Cardwell – 4:49.97 Jessica Eden – 4:50.65 Gena Jorgenson – 4:51.94 Applejean Gwinn – 4:52.64 Mackenzie Hodges – 4:53.44While only the last two heats of the women’s 400 IM were circle-seeded the first heat saw some fireworks as Summer Cardwell, entered with a yards time, posted a fast prelims time of 4:49.97. Cardwell, who swims for the University of Louisville, entered the meet with a PB of 4:51.19, but undercut that time by over a second by using a strong butterfly split of 1:03.49, just one of two sub-1:04 splits in the field, and built upon that with a 1:12.53 to make the halfway turn at 2:16.02. She struggled on the breaststroke but closed in 33.56/31.97 to post her first time ever under 4:50.
In the first of the circle seeded heats only Kayla Hardy surpassed Cardwell’s time as the Australian stopped the clock at 4:49.65. Hardy joined Cardwell under 1:04 on the opening leg, splitting 1:03.94, but fell back on the backstroke, hitting the halfway point at 2:18.45. A strong breaststroke split made up that difference and then some as Hardy was ahead (0f Cardwell) by over four seconds at the 300 mark, and she cruised into the wall splitting 34.76/34.52 to take over the top spot on the leaderboard. In her heat, the next fastest competitor was Gena Jorgenson, who was .05 back at the 200 but faded on the breaststroke and couldn’t run her down in the closing meters, touching in 4:51.94.
The last heat was all Justina Kozan at the end. The USC product who recently switched her sporting nationality to Poland opened in 1:04.92 and was 2:19.82 at the 200 meter mark. She trailed OSU’s Jessica Eden by 1.62 at the 200 mark but Kozan’s back half was too much for the Buckeye, as she out split her by 7 seconds on the last two one hundreds with Kozan touching in 4:45.15, with Eden at 4:50.65. Also slipping by Eden was Reese Tiltmann her Big 10 rival at Indiana, who powered her way on the last 100 to touch 2nd at 4:49.53.
MEN’S 400 INDIVIDUAL MEDLEY – Prelims
World Record: 4:02.50 – Leon Marchand, FRA (2023) American Record: 4:03.84 – Michael Phelps, (2008) U.S. Open Record: 4:05.25 – Michael Phelps, USA (2008) World Junior Record: 4:09.38 – Yumeki Kojima, JPN (2025) Pro Swim Series Record: 4:07.80 – Leon Marchand, FRA (2023)Top 8
David Johnston – 4:17.87 Michael Hochwalt – 4:17.92 Kieran Smith – 4:19.36 Tommy Bried – 4:20.17 Se-Bom Lee – 4:21.17 Grant Sanders – 4:21.50 Jackson Millard – 4:21.51 TJ Frost – 4:22.10With Evan Mackesy’s 4:27.28 from the first heat to beat, Australia’s Se-Bom Lee got himself out to an early lead on the top seeded Kieran Smith, as he opened in 57.78, with Smith back by half as second at 58.28. Lee, who was a Tokyo Olympian in this event extended his lead on the backstroke and made the back to breast transition turn at 2:04.00 increasing his lead by another half second, as Smith trailed at 2:05.05. The Florida based swimmer punched back on the breaststroke as he reversed the lead and opened up a lead of 1.68 by the 300 meter wall and he never looked back as he cruised into the wall splitting 31.40/30.17 to record a time of 4:19.36, nearly two seconds ahea of Lee’s 4:21.17.
The last heat was a tale of two stories as ASU’s Michael Hochwalt got out to an early start opening in 56.80, with Tommy Bried in hot purist at 59.96. Hochwalt distanced himself from the top seed Bried, opening up a two second advantage at the 200 turn 2:03.61 to 2:05.81. However, Hochwalt faced a new threat as David Johnston, who was 58.16 at the 100 turn surged on the backstroke and was within half a second as he made the turn to breaststroke at 2:03.96. The third leg of the race made all the difference as the Texas Longhorn, gained himself an advantage of just under a second and never relinquished it, despite Hochwalt’s coming home in 28.29 as Johnston, 29.61 on the last 50 got his fingers onto the wall first by .05, 4:17.87 to 4:17.92.
WOMEN’S 50 BUTTERFLY – Prelims
World Record: 24.43 – Sarah Sjöström, SWE (2014) American Record: 24.66 – Gretchen Walsh, (2025) U.S. Open Record: 24.66 – Gretchen Walsh, USA (2025) World Junior Record: 25.46 – Rikako Ikee, JPN (2017) Pro Swim Series Record: 24.66 – Gretchen Walsh, USA (2025)Top 8
Lismar Lyon – 26.68 Isabella Boyd – 26.96 Carly Novelline – 26.98 Miriam Sheehan – 27.05 Lawson Ficken – 27.17 Sydney Gring – 27.24 Ava Chavez – 27.35 Bailey Hartman – 27.39The least entered event of the morning, with just 14 participants, the women’s 50 fly was fast from the start as the 6th seed Lismar Lyon posted a swift 26.68 to win the first heat. The Venezuelan national record holder, Lyon set her best at Pros Swim Series in Fort Lauderdale and will be chasing that time of 26.43 from lane 4 tonight as her time withstood the 2nd heat’s attempts to dislodge her.
Her biggest competition tonight will likely come from Isabella Boyd, the top seed who took the 2nd heat in 26.96. Boyd finished 2nd in the 100 fly last night, but may not have the top end speed to challenge Lyon for the win. Don’t count out Carly Novelline, who joined the pair under 27 as she touched in 26.98. Novelline, who swims for UVA was a part of the 200 Medley relay which won at the 2024 NCAAs.
MEN’S 50 BUTTERFLY – Prelims
World Record: 22.27 – Andrii Govorov, UKR (2018) American Record: 22.35 – Caeleb Dressel, (2019) U.S. Open Record: 22.84 – Caeleb Dressel, USA (2022) World Junior Record: 22.96 – Diogo Ribeiro, POR (2022) Pro Swim Series Record: 23.09 – Ilya Kharun, CAN (2025)Top 8
Ben Armbruster – 23.10 Caeleb Dressel – 23.28 Aiden Hayes – 23.66 Julian Koch – 23.83 Max Kleinman – 23.88 August Vetsch – 24.10 Luke Barr – 24.22 Sebastian Smith – 24.34I’ve used the term fireworks often enough already but Ben Armbruster of Australia nearly set some off as he absolutely scorched his way to the top time in the men’s 50 fly. The 23-year-old swimming out of heat 2 lane 4, exploded off the block ands pardon the pun, flew down the length of the pool to hit the wall in 23.10. His time was not only .02 off his 2nd place finishing time at the Australian Trials, but came within .01 of the Pro Swim Series Record set by Ilya Kharun.
Flanking him in lanes 5 and 3 tonight will be Caeleb Dressel and Aiden Hayes. The pair of Americans entered the meet as the 1st and 3rd seeds and will each look to supplant the Australian atop the podium. Dressel won the 3rd heat in 23.28, his fastest time since 2022, while Hayes won the first heat in 23.66, his fastest ever, beating out his old PB of 23.87 from 2023 by .21.
The University of Pittsburgh’s Julian Koch made it two for two on earning A-final swims this morning. Kock earlier in the session qualified for the 100 free final in 3rd position, and advanced into the 50 fly final in 4th with a time of 23.83. Cougar Aquatics Max Kleinman joined the aforementioned quartet under 24 seconds with his 23.88.
WOMEN’S 100 BACKSTROKE – Prelims
World Record: 57.13 – Regan Smith, USA (2024) American Record: 57.13 – Regan Smith, (2024) U.S. Open Record: 57.13 – Regan Smith, USA (2024) World Junior Record: 57.57 – Regan Smith, USA (2019) Pro Swim Series Record: 57.46 – Regan Smith, USA (2025)Top 8
Results not yet uploaded
MEN’S 100 BACKSTROKE – Prelims
World Record: 51.60 – Thomas Ceccon, ITA (2022) American Record: 51.85 – Ryan Murphy, (2016) U.S. Open Record: 50.94 – Aaron Peirsol, USA (2009) World Junior Record: 52.08 – Miron Lifintsev, RUS (2024) Pro Swim Series Record: 52.40 – David Plummer, USA (2016)Top 8
Results not yet uploaded
Wolfpack Elite’s Hudson Williams won the first heat in 53.64, .02 off his personal best from the prelims of the 2025 US Nationals, a time that saw him move into the final as the 3rd seed, where he ultimately finished 7th at 54.25. This morning his time would have made him a strong favorite to podium this evening, but at the conclusion of the heat, he was disqualified for a false start.
Two heats later, Hunter Armstrong, the top seed, did not take to the water. Armstrong was also entered in the 100 free and 50 fly earlier in the session but did not swim in either of those events. His results in the 100 free are listed as a No-Show while the 50 fly results show a DFS.
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