2026 Pro Swim Series – Westmont
- Wednesday, March 4 – Saturday, March 7, 2026
- FMC Aquatic Center, Westmont, Illinois
- Long Course Meters (50 meters)
- Meet Central
- Psych Sheet
- Results on Meet Mobile: “2026 TYR Pro Swim Series – Westmont”
- Live Stream
- Day 1 Prelims Heat Sheet
- Live Recaps
- Prelims: Day 1
In this morning’s prelims session at the 2026 Pro Swim Series in Westmont, Chris Guiliano set a new PSS record in the men’s 100 freestyle of 47.38, which ties his 2nd best time ever in the event, only behind the 47.25 he swam at the U.S. Trials.
This swim moved him up to #1 in the world so far this season, but, perhaps more than that, it showed a massive return to form as his fastest swim outside of his breakout 2024 U.S. Olympic Trials, and brings into question the potential for a new 400 freestyle relay World Record this summer.
Currently, the men’s 400 freestyle relay is the oldest World Record on the books. In 2008, the American team of Michael Phelps, Garrett Weber-Gale, Cullen Jones, and Jason Lezak swam 3:08.24 at the Beijing Olympics in what is widely regarded as one of the best races in Olympic history.
Since then, the closest anyone has been to the record was the Australian team at the 2025 World Championships when Flynn Southam, Kai Taylor, Maximillian Giuliani, and Kyle Chalmers swam 3:08.97.
Guiliano’s swim points to a potential World Record from the American team at this summer’s Pan Pacs.
Last summer, the American men, who were plagued by illness all week, won the bronze in 3:09.64 with Guiliano swimming 47.43 on the 3rd leg. Jack Alexy led the team off in 47.24. Patrick Sammon swam 47.03 on the 2nd leg, and Jonny Kulow anchored in 47.94.
Alexy had a major breakthrough summer for Team USA in Singapore, and has a lifetime best 46.81 in the 100 freestyle from a flat start. In the final of the men’s medley relay, Alexy set the 2nd fastest relay split in history, touching in 45.95, coming in more than a tenth under Jason Lezak‘s 46.06 anchor from the 2008 relay.
Patrick Sammon also had a very strong 2025, and currently holds a lifetime best 47.47 in the individual 100 free. In Singapore, he dropped under the 47 second mark on the 2nd leg of the mixed 400 free relay final, splitting 46.70.
Jonny Kulow swam 47.94 on the anchor leg. His fastest split of the meet was a 47.51 from the 400 freestyle relay prelims. His flat start best time is 47.82. Kulow is not eligible for the Pan Pacs relays since he did not make the roster.
If we look outside the four swimmers from Singapore, the United States is not hurting for men’s 100 freestylers. Henry McFadden has a lifetime best 47.97, and Destin Lasco has a flat start best of 47.58, and was 47.60 on the prelims version of the 400 freestyle relay.
Relay Split Add-Ups
| Split Add-Ups | Option A | Option B |
World Record Relay
|
| 100 | Jack Alexy — 46.81 | Chris Guiliano – 47.38 |
Michael Phelps – 47.51
|
| 200 | Patrick Sammon — 46.70 | Patrick Sammon – 46.70 |
Garrett Weber-Gale – 47.02
|
| 300 | Destin Lasco — 47.58 (FS) | Destin Lasco — 47.58 (FS) |
Cullen Jones – 47.65
|
| 400 | Chris Guiliano — 47.38 (FS) | Jack Alexy – 45.95 |
Jason Lezak – 46.06
|
| 3:08.47 | 3:07.61 | 3:08.24 |
And for note- before last summer Dressel/ Blake/ Bowen and Apple went same time as australians did in singapore, at tokyo 2020
On paper the world record has been on watch since 2019. US team has the best chance but putting together 4 PB legs at the same time is impossible
Agreed. Based upon pure depth in recent years this record should have been beaten by the US men. I think it’s more of a lack of group confidence/direction-connection that has held the men back lately. I think it’s about the change.
One of the best races in Oly history. Yes, if you’re under 40 I imagine so
it’s one of the best races in swimming history no matter how old you are
I think Kulow doesn’t have enough international experience. He has a 47 low in him
Kulow’s has two significant international team experiences He went to the PanAm Games in 10/2023 in Santiago, Chile, where he had a PB 100 Free at :48.38 and finished the meet with three rolling start swims of :47.44, :47.39 and his PBR of :47.32. (PBR = Personal Best Rolling). Singapore was his next major international competition.
Jonny has improved somewhat steadily throughout his career at ASU; his series of three rolling start swims in Singapore were all slower than in Santiago, and progressively slower, whereas his PanAm swims were all progressively faster, ending with his PBR :47.32, suggesting he was possibly one of the Men affected by the pre-meet illnesses. His Singapore progression was :47.51, :47.68 and :47.94
It’s completely wild that the Aussies came so close last year with really only one big name. Such a great team effort.
Aussies will break it at Com games this year.
Oh God!
The male contingent of USA Swimming was suppose to break the World Record in the M 4 x 200 FR-R at the 2025 World Aquatics Championships yet finished completely off the medal podium.
That’s not accurate at all. Brits were heavy favorites
They really weren’t.
GB’s slowest split was .17 faster than USA’s 2nd fastest split. You don’t really grasp math, do you?
Prior to a virus going through the American team the Americans were looking like favourites.
Lol no? Swimswam predicted USA to win and vast majority of commenters did too
https://swimswam.com/2025-world-championship-previews-heavyweights-to-slug-it-out-in-the-mens-4×200-free/
Sorry, you literally commented: “GB is over hyped. Their time is over. This is the US’ relay to lose”.
So you didnt seem to that? https://swimswam.com/2025-world-championship-previews-heavyweights-to-slug-it-out-in-the-mens-4×200-free/#comment-1590755
A totally different set of swimmers, and I don’t think they were “suppose to break the World Record”. They had a shot if everything was firing on all cylinders. I remember it being a toss up between GB and USA, with the USA getting a slight edge.
This sounds like fun, I want to join in!
Aussies break the WR in Brisbane 2032 with Southam, Stotz, Taylor and Chalmers having the retirement swim of his life!
why would you even say this? this is so so wrong i dont even know why you would even think about typing this out
/s
Well if we’re dreaming this far ahead, let’s just assume my dream of McEvoy and Chalmers teaming up for some retirement heroics has to be entertained as well. C’mon Cam, one final heroic 100 to really blow our minds 😁🙏