swimKatherine O'Brien
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 25 Freestyle | SCY | 17.04 | 2020-02-07 | 2020 MR YMID February Classic | |
| 50 Freestyle | SCY | 25.33 | AAA+0.84s to AAAA·+0.54s to Sectionals | 2023-10-21 | 2023 MR LIAC Chappy's Invitational |
| 100 Freestyle | SCY | 58.11 | AA+2.32s to AAA·+5.02s to Sectionals | 2023-01-01 | Sanction #: 231007 |
| 200 Freestyle | SCY | 2:08.15 | A+1.76s to AA·+13.16s to Sectionals | 2026-02-20 | 2026 MR Silvers Championship South - HAUP |
| 500 Freestyle | SCY | 4:57.45 | AAAA·Futures ✓+7.46s to US Open | 2026-01-16 | 2026 MR NFS 43rd Annual Dr. MLK Jr. Invite |
| 25 Backstroke | SCY | 32.99 | 2020-02-07 | 2020 MR YMID February Classic | |
| 50 Backstroke | SCY | 31.00 | A+1.01s to AA·+4.71s to Futures | 2025-10-04 | 2025 MR LIAC Fast Fall Invitational slow pool |
| 100 Backstroke | SCY | 1:05.64 | A+2.25s to AA·+6.35s to Sectionals | 2025-01-26 | CT 2025 CPAC January AGQ venue |
| 200 Backstroke | SCY | 2:22.56 | A+4.67s to AA·+13.67s to Sectionals | 2026-02-20 | 2026 MR Silvers Championship South - HAUP |
| 25 Breaststroke | SCY | 28.42 | 2019-12-08 | 2019 MR GAEL December 8 & Under Meet | |
| 50 Breaststroke | SCY | 40.36 | B+1.27s to BB·+10.57s to Futures | 2025-12-11 | 2025 East Coast WinterFest |
| 100 Breaststroke | SCY | 49.86 | AAAA·Nationals ✓ | 2021-11-19 | 2021 MR LIAC Thanksgiving Invitational |
| 200 Breaststroke | SCY | 2:48.57 | BB+4.78s to A·+19.18s to Sectionals | 2024-01-13 | 2024 MR AGUA MLK Invitational |
| 25 Butterfly | SCY | 18.37 | 2020-03-07 | 2020 MR Metro 8 & Under Championships | |
| 50 Butterfly | SCY | 30.85 | A+1.26s to AA·+5.16s to Futures | 2025-12-11 | 2025 East Coast WinterFest |
| 100 Butterfly | SCY | 1:00.64 | AA+0.25s to AAA·+2.15s to Sectionals | 2025-01-24 | CT 2025 CPAC January AGQ |
| 100 Individual Medley | SCY | 1:15.35 | 2022-02-11 | CT WAC Everyone is Invite Meet venue | |
| 200 Individual Medley | SCY | 2:17.12 | AA+1.53s to AAA·+6.43s to Sectionals | 2024-02-23 | 2024 MR Metro Silvers Championships South |
| 50 Freestyle | LCM | 31.30 | A+0.61s to AA·+3.01s to Sectionals | 2025-04-25 | 2025 MR LIAC Speedo Long Island Challenge |
| 100 Freestyle | LCM | 1:08.07 | A+1.38s to AA·+7.38s to Sectionals | 2025-05-10 | 2025 MR LIAC Spring Kickoff Invitational |
| 200 Freestyle | LCM | 2:33.70 | BB+3.31s to A·+22.81s to Sectionals | 2024-06-22 | 2024 MR LIAC Summer Fun Invitational |
| 50 Backstroke | LCM | 37.79 | BB+1.20s to A·+6.90s to Futures | 2024-04-27 | 2024 MR LIAC Speedo Long Island Challenge venue |
| 100 Backstroke | LCM | 1:20.04 | BB+2.95s to A·+12.15s to Sectionals | 2024-06-22 | 2024 MR LIAC Summer Fun Invitational venue |
| 200 Backstroke | LCM | 2:42.30 | A+3.01s to AA·+16.11s to Sectionals | 2025-04-25 | 2025 MR LIAC Speedo Long Island Challenge |
| 50 Breaststroke | LCM | 1:17.26 | +29.37s to B·+42.47s to Futures | 2019-06-07 | 2019 mr lie juen jump res |
| 100 Breaststroke | LCM | 1:24.74 | A+0.55s to AA·+6.85s to Sectionals | 2025-06-07 | 2025 MR LIAC Summertime Classic Invitational |
| 50 Butterfly | LCM | 1:00.94 | +20.95s to B·+31.45s to Futures | 2019-07-12 | 2019 MR COND July Jubilee Invitational |
| 100 Butterfly | LCM | 1:51.52 | +24.13s to B·+45.23s to Sectionals | 2022-06-11 | 2022 MR LIAC Summertime Classic Invitational |
| 200 Individual Medley | LCM | 2:55.21 | BB+6.02s to A·+26.82s to Sectionals | 2025-06-21 | 2025 MR LIAC Summer Fun Invitational |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 14.
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.
IMX / IMR
IMX 13-14 · SCY
3212 points (4/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 500 FR SCY | 4:57.45 | 1100 |
| 200 BK SCY | 2:22.56 | 670 |
| 200 BR SCY | 2:48.57 | 614 |
| 200 IM SCY | 2:17.12 | 828 |
| 200 FL SCY | — | 0 |
| 400 IM SCY | — | 0 |
IMR 13-14 · SCY
4190 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 2:08.15 | 728 |
| 100 BK SCY | 1:05.64 | 678 |
| 100 BR SCY | 49.86 | 1100 |
| 100 FL SCY | 1:00.64 | 856 |
| 200 IM SCY | 2:17.12 | 828 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
500 Freestyle SCY 4:57.45 split/total mismatch
100 Backstroke SCY 1:05.64
Front half 31.76s · back half 33.88s
100 Butterfly SCY 1:00.64 split/total mismatch
200 Individual Medley SCY 2:17.12
Front half 65.49s · back half 71.63s
50 Freestyle LCM 31.30 split/total mismatch
Front half 307.02s · back half -275.72s
200 Freestyle LCM 2:33.70
Front half 75.31s · back half 78.39s
100 Backstroke LCM 1:20.04
Front half 39.15s · back half 40.89s
200 Individual Medley LCM 2:55.21
Progression
Faster times are higher. One card per event, all courses & history.