swimAidan O'Brien
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 23.64 | A+0.55s to AA | 2026-03-21 | 2026 OSI Arena RegionXII SC Championships venue |
| 100 Freestyle | SCY | 52.96 | BB+0.37s to A | 2026-03-22 | 2026 OSI Arena RegionXII SC Championships venue |
| 200 Freestyle | SCY | 2:00.73 | BB+4.74s to A | 2025-12-14 | 2025 TEAM Winter Invitational venue |
| 500 Freestyle | SCY | 5:55.17 | B+14.08s to BB | 2025-10-25 | 2025 TEAM IMX/IMR Challenge venue |
| 50 Backstroke | SCY | 31.11 | B+2.12s to BB | 2025-10-24 | 2025 TEAM IMX/IMR Challenge venue |
| 100 Backstroke | SCY | 1:00.55 | BB+3.26s to A | 2026-04-17 | 2026 April Mini Meet venue |
| 200 Backstroke | SCY | 2:32.91 | +6.82s to B | 2025-10-25 | 2025 TEAM IMX/IMR Challenge venue |
| 50 Breaststroke | SCY | 27.67 | AAA+0.68s to AAAA | 2025-12-13 | 2025 TEAM Winter Invitational venue |
| 100 Breaststroke | SCY | 1:01.27 | AA+1.88s to AAA | 2026-01-17 | 2026 PN VAST 49th Annual Washington Open- APP venue |
| 200 Breaststroke | SCY | 2:18.54 | A+3.65s to AA | 2026-03-20 | 2026 OSI Arena RegionXII SC Championships venue |
| 50 Butterfly | SCY | 25.50 | AA+1.01s to AAA | 2026-06-05 | 2026 June Mini Meet venue |
| 100 Butterfly | SCY | 58.69 | BB+2.00s to A | 2026-01-17 | 2026 PN VAST 49th Annual Washington Open- APP venue |
| 200 Butterfly | SCY | 2:37.69 | +8.90s to B | 2025-10-26 | 2025 TEAM IMX/IMR Challenge venue |
| 100 Individual Medley | SCY | 59.58 | 2026-04-17 | 2026 April Mini Meet venue | |
| 200 Individual Medley | SCY | 2:09.54 | BB+1.35s to A | 2026-03-20 | 2026 OSI Arena RegionXII SC Championships venue |
| 400 Individual Medley | SCY | 5:24.90 | +2.91s to B | 2025-10-26 | 2025 TEAM IMX/IMR Challenge venue |
| 50 Freestyle | SCM | 26.74 | BB+0.15s to A | 2026-04-25 | 2026 April Senior Grey Meet venue |
| 100 Breaststroke | SCM | 1:10.67 | A+2.08s to AA | 2026-04-25 | 2026 April Senior Grey Meet venue |
| 50 Butterfly | SCM | 28.34 | A+0.05s to AA | 2026-04-25 | 2026 April Senior Grey Meet venue |
| 50 Freestyle | LCM | 26.73 | A+0.04s to AA | 2026-07-03 | 2026 Keo Nakama Swim Meet venue |
| 100 Freestyle | LCM | 1:00.36 | A+2.27s to AA | 2026-06-13 | 2026 THSC June Open venue |
| 200 Freestyle | LCM | 2:15.85 | BB+2.56s to A | 2026-05-10 | Bend Swim Club May Invitational 2026 venue |
| 50 Backstroke | LCM | 38.16 | +0.77s to B | 2025-05-17 | TEAM Showdown venue |
| 100 Backstroke | LCM | 1:16.44 | B+3.35s to BB | 2026-05-17 | 2026 TEAM Showdown venue |
| 50 Breaststroke | LCM | 31.84 | AAA+1.15s to AAAA | 2026-06-14 | 2026 THSC June Open venue |
| 100 Breaststroke | LCM | 1:14.64 | A+2.25s to AA | 2026-06-13 | 2026 THSC June Open venue |
| 200 Breaststroke | LCM | 2:41.58 | A+3.69s to AA | 2026-06-12 | 2026 THSC June Open |
| 50 Butterfly | LCM | 27.81 | AA+0.12s to AAA | 2026-06-13 | 2026 THSC June Open venue |
| 100 Butterfly | LCM | 1:06.04 | BB+0.85s to A | 2026-07-04 | 2026 Keo Nakama Swim Meet venue |
| 200 Butterfly | LCM | 2:46.33 | B+8.84s to BB | 2026-05-17 | 2026 TEAM Showdown venue |
| 200 Individual Medley | LCM | 2:32.75 | BB+4.16s to A | 2026-05-09 | Bend Swim Club May Invitational 2026 venue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 17.
Fastest relay legs
| Leg | Course | Time | Start | Relay | Date | Meet |
|---|---|---|---|---|---|---|
| 100 Freestyle | SCY | 51.98 | flying | 400 Free Relay (leg 3) | 2026-03-01 | 2026 SI CA/NV Speedo Sectionals Oceanside |
| 50 Breaststroke | SCY | 31.45 | flying | 200 Medley Relay (leg 2) | 2025-02-22 | 2025 OSAA 6A Championships |
| 100 Breaststroke | LCM | 1:19.15 | flying | 400 Medley Relay (leg 2) | 2025-05-03 | 2025 AAA May LC Invitational |
Reconstructed from relay split marks. Flat = lead-off (comparable to individual times); flying starts run ~0.5–0.7s fast and are not PRs.
IMX / IMR
IMX 17-18 · SCY
2831 points (6/6 events)
| Event | Time | Points |
|---|---|---|
| 500 FR SCY | 5:55.17 | 451 |
| 200 BK SCY | 2:32.91 | 351 |
| 200 BR SCY | 2:18.54 | 677 |
| 200 FL SCY | 2:37.69 | 337 |
| 200 IM SCY | 2:09.54 | 622 |
| 400 IM SCY | 5:24.90 | 393 |
IMR 17-18 · SCY
3067 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 2:00.73 | 571 |
| 100 BK SCY | 1:00.55 | 526 |
| 100 BR SCY | 1:01.27 | 763 |
| 100 FL SCY | 58.69 | 585 |
| 200 IM SCY | 2:09.54 | 622 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 52.96
Front half 25.59s · back half 27.37s
200 Freestyle SCY 2:00.73
Front half 58.19s · back half 62.54s
500 Freestyle SCY 5:55.17
Front half 179.46s · back half 175.71s
200 Backstroke SCY 2:32.91
Front half 78.20s · back half 74.71s
100 Breaststroke SCY 1:01.27 RT 0.64s
Front half 28.84s · back half 32.43s
200 Breaststroke SCY 2:18.54
Front half 66.56s · back half 71.98s
100 Butterfly SCY 58.69
Front half 26.63s · back half 32.06s
200 Butterfly SCY 2:37.69
Front half 76.06s · back half 81.63s
200 Individual Medley SCY 2:09.54
Front half 63.18s · back half 66.36s
400 Individual Medley SCY 5:24.90
100 Freestyle LCM 1:00.36
Front half 28.45s · back half 31.91s
200 Freestyle LCM 2:15.85
Front half 66.16s · back half 69.69s
100 Breaststroke LCM 1:14.64
Front half 35.69s · back half 38.95s
200 Butterfly LCM 2:46.33
Front half 76.58s · back half 89.75s
200 Individual Medley LCM 2:32.75
Front half 74.55s · back half 78.20s
Reaction time
From electronically-timed starts only (~2% of corpus swims carry a reaction time). PRs with a recorded reaction show an RT chip in the splits section above.
Progression
Faster times are higher. One card per event, all courses & history.