swimKathryn O'Brien
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 29.67 | BB+1.08s to A | 2024-07-13 | 2024 IL BSC Summer Regional Championships slow pool |
| 100 Freestyle | SCY | 1:09.40 | B+2.11s to BB | 2024-10-13 | 2024 Greater Milwaukee Open venue |
| 200 Freestyle | SCY | 2:34.50 | B+8.01s to BB | 2024-02-11 | 2024 PX3 Valentine Open slow pool |
| 500 Freestyle | SCY | 6:13.29 | BB+12.80s to A | 2025-07-19 | 2025 ISI Summer HPAC Regional venue |
| 1000 Freestyle | SCY | 12:46.66 | BB+15.97s to A | 2025-07-18 | 2025 ISI Summer HPAC Regional venue |
| 1650 Freestyle | SCY | 21:30.95 | BB+42.26s to A | 2025-07-20 | 2025 ISI Summer HPAC Regional venue |
| 50 Backstroke | SCY | 36.84 | B+2.25s to BB | 2024-10-12 | 2024 Greater Milwaukee Open venue |
| 100 Backstroke | SCY | 1:18.55 | B+4.96s to BB | 2024-10-12 | 2024 Greater Milwaukee Open venue |
| 200 Backstroke | SCY | 2:56.78 | +5.79s to B | 2024-02-11 | 2024 PX3 Valentine Open slow pool |
| 50 Breaststroke | SCY | 46.28 | +3.09s to B | 2024-10-13 | 2024 Greater Milwaukee Open venue |
| 100 Breaststroke | SCY | 1:42.84 | +11.85s to B | 2024-02-11 | 2024 PX3 Valentine Open slow pool |
| 50 Butterfly | SCY | 34.86 | B+0.77s to BB | 2024-10-13 | 2024 Greater Milwaukee Open venue |
| 100 Butterfly | SCY | 1:24.63 | +5.74s to B | 2024-01-07 | LFSC Windy City Open slow pool |
| 100 Individual Medley | SCY | 1:22.75 | 2024-01-20 | 2024 MMSC Winter Invite slow pool | |
| 200 Individual Medley | SCY | 3:01.40 | +4.71s to B | 2024-02-10 | 2024 PX3 Valentine Open slow pool |
| 50 Freestyle | LCM | 34.02 | BB+1.43s to A | 2024-06-02 | LFSC SwimFest LC 2024 slow pool |
| 100 Freestyle | LCM | 1:19.20 | B+2.31s to BB | 2024-05-04 | Daniel Jaekel Friendship Classic 2024 slow pool |
| 400 Freestyle | LCM | 6:04.53 | B+12.44s to BB | 2024-06-02 | LFSC SwimFest LC 2024 slow pool |
| 50 Backstroke | LCM | 42.27 | B+1.68s to BB | 2024-06-02 | LFSC SwimFest LC 2024 slow pool |
| 100 Backstroke | LCM | 1:35.60 | +3.01s to B | 2024-05-04 | Daniel Jaekel Friendship Classic 2024 slow pool |
| 50 Breaststroke | LCM | 53.32 | +4.23s to B | 2024-06-02 | LFSC SwimFest LC 2024 slow pool |
| 100 Breaststroke | LCM | 1:58.75 | +14.06s to B | 2024-05-04 | Daniel Jaekel Friendship Classic 2024 slow pool |
| 50 Butterfly | LCM | 43.92 | +2.73s to B | 2024-05-04 | Daniel Jaekel Friendship Classic 2024 slow pool |
| 100 Butterfly | LCM | 1:36.10 | +6.21s to B | 2024-06-02 | LFSC SwimFest LC 2024 slow pool |
| 200 Individual Medley | LCM | 3:26.99 | +4.60s to B | 2024-05-04 | Daniel Jaekel Friendship Classic 2024 slow pool |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 13.
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 | SCY | 28.74 | flying | 200 Free Relay (leg 4) | 2025-07-20 | 2025 ISI Summer HPAC Regional |
| 50 Freestyle | SCY | 28.75 | flying | 200 Medley Relay (leg 4) | 2025-07-19 | 2025 ISI Summer HPAC Regional |
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 13-14 · SCY
1276 points (3/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 500 FR SCY | 6:13.29 | 568 |
| 200 BK SCY | 2:56.78 | 351 |
| 200 IM SCY | 3:01.40 | 357 |
| 200 BR SCY | — | 0 |
| 200 FL SCY | — | 0 |
| 400 IM SCY | — | 0 |
IMR 13-14 · SCY
1753 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 2:34.50 | 415 |
| 100 BK SCY | 1:18.55 | 396 |
| 100 BR SCY | 1:42.84 | 270 |
| 100 FL SCY | 1:24.63 | 315 |
| 200 IM SCY | 3:01.40 | 357 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 1:09.40
Front half 32.37s · back half 37.03s
200 Freestyle SCY 2:34.50
Front half 75.50s · back half 79.00s
500 Freestyle SCY 6:13.29
Front half 184.92s · back half 188.37s
1000 Freestyle SCY 12:46.66
Front half 382.63s · back half 384.03s
1650 Freestyle SCY 21:30.95
100 Backstroke SCY 1:18.55
Front half 38.18s · back half 40.37s
200 Backstroke SCY 2:56.78
Front half 86.88s · back half 89.90s
100 Breaststroke SCY 1:42.84
Front half 48.45s · back half 54.39s
100 Butterfly SCY 1:24.63
Front half 38.17s · back half 46.46s
100 Individual Medley SCY 1:22.75
Front half 36.84s · back half 45.91s
200 Individual Medley SCY 3:01.40
Front half 83.92s · back half 97.48s
100 Freestyle LCM 1:19.20
Front half 37.31s · back half 41.89s
400 Freestyle LCM 6:04.53
Front half 177.21s · back half 187.32s
100 Backstroke LCM 1:35.60
Front half 46.37s · back half 49.23s
100 Breaststroke LCM 1:58.75
Front half 55.93s · back half 62.82s
100 Butterfly LCM 1:36.10
Front half 44.02s · back half 52.08s
200 Individual Medley LCM 3:26.99
Front half 98.42s · back half 108.57s
Progression
Faster times are higher. One card per event, all courses & history.