2025 U.S. OPEN
- December 3-6, 2025
- Austin, Texas
- Lee and Joe Jamail Texas Swimming Center
- Prelims: 10 a.m. EST
- Finals: 7 p.m EST (Day 1: 5 p.m. EST)
- LCM (50 meters)
- Meet Central
- Psych Sheets
- Live Results
- Live Recaps
MEN’S 100 FLY – Finals
- World Record: 49.45, Caeleb Dressel (USA) – 2021
- U.S. Open Record: 49.76, Caeleb Dressel (USA) – 2021
U.S. Open Meet Record: 50.78, Shaine Casas (USA) – 2023Texas Pool Record: 50.78, Shaine Casas
Top 8 Finishers
- Shaine Casas (TXLA) – 50.24 CR
- Ilya Kharun (UN-AZ) – 50.40
- Leon Marchand (TXLA) – 51.20
- Caeleb Dressel (SJAC) – 51.33
- Hubert Kos (TXLA) – 51.72
- Bjoern Kammann (TNAQ) – 51.95
- Dare Rose (SCAR) – 52.06
- Aiden Hayes (NCS) – 52.68
After breaking the US Open meet record in prelims, Shaine Casas swam to another record tonight posting a 50.24 in the men’s 100 butterfly. Casas also becomes the #9 performer all-time in the event.
Split Comparison
| 2025 US Open – Finals | 2025 U.S. Open- Prelims |
2023 U.S. Open
|
|
| 50 | 23.22 | 23.37 | 23.6 |
| 100 | 27.02 | 27.41 | 27.43 |
| Total | 50.24 | 50.78 | 51.03 |
Casas was faster tonight than he was this morning on both 50s, although the 2nd 50 was a bigger difference than the first 50. He has been under the 51-second mark seven times in his career now.
With his swim tonight, Casas also moves up to become the #9 performer all-time. He previously sat tied as the #11 performer all-time with his previous best time of a 50.40 that he swam at 2022 Nationals. He is the 3rd fastest American all-time, only behind Caeleb Dressel and Michael Phelps.
All- Time Top Performers, Men’s LCM 100 Fly
- Caeleb Dressel, 49.45 — 2020 Olympic Games
- Maxime Grousset, 49.62 — 2025 World Champs
- Kristóf Milák, 49.68 — 2020 Olympic Games
- Michael Phelps, 49.82 — 2009 World Champs
- Noe Ponti, 49.83 — 2025 World Champs
- Milo Cavic, 49.95 — 2009 World Champs
- Josh Liendo, 49.99 — 2024 Olympic Games
- Ilya Kharun, 50.07 — 2025 World Champs
- Shaine Casas, 50.24 – 2025 US Open
- Matthew Temple, 50.25 — Japan Open (50m) 2023
Casas’ time tonight notably would have been 5th in finals at the 2025 World Championships. He did not advance to semifinals in the event after swimming a 51.66 for 19th during prelims.
So great to see this from Casas! This race lived up to expectations. Good time from Kharun at midseason. Nice to see Marchand get a PB. Encouraging time from Dressel.
Casas is like a wild horse. The only person that can rein him in is Bob and he potentially can be the best ever. If his head doesn’t get in the way that is.
He said he was almost kicked out of the Colorado training camp. His head is getting in the way.
I thought that was because he couldn’t handle the workload?
Casas is a beast! Super talented — glad to see him performing closer to his true potential!
Over 20 years on, he has just become the 2nd American to ever beat Crocker’s textile 50.40 from 2005.
Cavic is an American, born and raised in California. Kharun is also now an American citizen.