swimAJ O'Brien
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 35.62 | +8.03s to B·+13.03s to Sectionals | 2017-12-17 | Candy Cane Classic 2017 slow pool |
| 500 Freestyle | SCY | 5:27.22 | BB+14.53s to A·+34.33s to Sectionals | 2024-12-08 | 2024 OH CAC VD Challenge venue |
| 50 Backstroke | SCY | 41.64 | +10.75s to B·+17.15s to Sectionals | 2017-12-17 | Candy Cane Classic 2017 slow pool |
| 50 Breaststroke | SCY | 46.60 | +11.01s to B·+19.41s to Sectionals | 2017-12-17 | Candy Cane Classic 2017 slow pool |
| 50 Butterfly | SCY | 40.48 | +9.59s to B·+16.79s to Sectionals | 2017-12-17 | Candy Cane Classic 2017 slow pool |
| 50 Freestyle | LCM | 28.12 | BB+0.73s to A·+2.13s to Sectionals | 2024-07-27 | 2024 OH LSC LC Senior Champs venue |
| 100 Freestyle | LCM | 1:03.14 | BB+2.95s to A·+6.55s to Sectionals | 2024-07-28 | 2024 OH LSC LC Senior Champs venue |
| 400 Freestyle | LCM | 4:57.61 | BB+16.92s to A·+35.42s to Sectionals | 2024-07-28 | 2024 OH LSC LC Senior Champs venue |
| 100 Breaststroke | LCM | 1:18.30 | BB+3.61s to A·+5.51s to Sectionals | 2024-07-26 | 2024 OH LSC LC Senior Champs venue |
| 200 Breaststroke | LCM | 2:56.04 | BB+12.75s to A·+16.25s to Sectionals | 2024-07-27 | 2024 OH LSC LC Senior Champs venue |
| 50 Butterfly | LCM | 25.83 | AAAA·Futures ✓+0.44s to Jr Nationals | 2024-07-25 | 2024 OH LSC LC Senior Champs |
| 100 Butterfly | LCM | 1:05.03 | BB+0.74s to A·+3.54s to Sectionals | 2024-07-26 | 2024 OH LSC LC Senior Champs venue |
| 200 Individual Medley | LCM | 2:40.67 | B+0.28s to BB·+21.28s to Sectionals | 2025-06-29 | 2025 CW Eric Namesnik Memorial Open venue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 18.
National cuts (Sectionals → Nationals) are the current-season meet qualifying times for the swimmer's zone and age group; ✓ marks the hardest cut already achieved.
Pool tags are a venue speed heuristic (median deviation of all swims there vs each swimmer's typical time) — see the venue page for the method.
Fastest relay legs
| Leg | Course | Time | Start | Relay | Date | Meet |
|---|---|---|---|---|---|---|
| 50 Freestyle | LCM | 27.47 | flying | 200 Free Relay (leg 3) | 2024-07-25 | 2024 OH LSC LC Senior Champs |
| 100 Freestyle | LCM | 1:03.44 | flying | 400 Free Relay (leg 4) | 2024-07-28 | 2024 OH LSC LC Senior Champs |
| 200 Freestyle | LCM | 2:19.37 | flat | 800 Free Relay | 2024-07-25 | 2024 OH LSC LC Senior Champs |
| 50 Butterfly | LCM | 28.33 | flying | 200 Medley Relay (leg 3) | 2024-07-26 | 2024 OH LSC LC Senior Champs |
| 100 Butterfly | LCM | 1:04.88 | flying | 400 Medley Relay (leg 3) | 2024-07-27 | 2024 OH LSC LC Senior Champs |
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 · LCM
1597 points (3/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 400 FR LCM | 4:57.61 | 557 |
| 200 BR LCM | 2:56.04 | 523 |
| 200 IM LCM | 2:40.67 | 517 |
| 200 BK LCM | — | 0 |
| 200 FL LCM | — | 0 |
| 400 IM LCM | — | 0 |
IMR 17-18 · LCM
1729 points (3/5 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 100 BR LCM | 1:18.30 | 574 |
| 100 FL LCM | 1:05.03 | 638 |
| 200 IM LCM | 2:40.67 | 517 |
| 200 FR LCM | — | 0 |
| 100 BK LCM | — | 0 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
500 Freestyle SCY 5:27.22
Front half 158.06s · back half 169.16s
100 Freestyle LCM 1:03.14
Front half 30.04s · back half 33.10s
400 Freestyle LCM 4:57.61
Front half 145.39s · back half 152.22s
100 Breaststroke LCM 1:18.30
Front half 35.35s · back half 42.95s
200 Breaststroke LCM 2:56.04
Front half 82.63s · back half 93.41s
100 Butterfly LCM 1:05.03
Front half 30.25s · back half 34.78s
200 Individual Medley LCM 2:40.67
Front half 77.70s · back half 82.97s
Progression
Faster times are higher. One card per event, all courses & history.