swimWilliam Choi
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 23.61 | A+0.52s to AA·+0.42s to Sectionals | 2025-10-11 | 2025 CA Cerritos SC Swim Meetvenue |
| 100 Freestyle | SCY | 51.87 | A+1.48s to AA·+0.88s to Sectionals | 2026-02-14 | 2026 Metro Champs @ La Mirada Armadavenue |
| 200 Freestyle | SCY | 1:50.42 | AA+4.03s to AAA·Sectionals ✓+8.83s to Futures | 2025-12-13 | 2025 CA SCS/RAA WAGvenue |
| 500 Freestyle | SCY | 5:04.52 | A+2.83s to AA·+1.83s to Sectionals | 2025-09-14 | 2025 DARE Launch & Lunge Season Openervenue |
| 100 Backstroke | SCY | 1:03.28 | B+1.19s to BB·+7.79s to Sectionals | 2024-07-13 | 2024 Metro Champs @LKWDslow pool |
| 200 Backstroke | SCY | 2:19.48 | B+3.79s to BB·+18.19s to Sectionals | 2024-11-10 | 2024 Downey Dolphins SC Meetvenue |
| 100 Breaststroke | SCY | 1:03.98 | A+1.89s to AA·+0.79s to Sectionals | 2024-12-13 | 2024 CA GWSC/SCS WAGvenue |
| 200 Breaststroke | SCY | 2:23.00 | BB+2.21s to A·+5.71s to Sectionals | 2024-12-15 | 2024 CA GWSC/SCS WAGvenue |
| 100 Butterfly | SCY | 54.55 | A+0.26s to AA·Sectionals ✓+3.96s to Futures | 2025-12-13 | 2025 CA SCS/RAA WAGvenue |
| 200 Butterfly | SCY | 2:02.81 | A+0.62s to AA·Sectionals ✓+9.12s to Futures | 2025-12-14 | 2025 CA SCS/RAA WAGvenue |
| 200 Individual Medley | SCY | 2:05.58 | A+2.69s to AA·+1.59s to Sectionals | 2024-12-14 | 2024 CA GWSC/SCS WAGvenue |
| 400 Individual Medley | SCY | 4:27.61 | A+3.12s to AA·+2.92s to Sectionals | 2024-12-13 | 2024 CA GWSC/SCS WAGvenue |
| 50 Freestyle | LCM | 26.41 | AA+0.92s to AAA·Sectionals ✓+1.82s to Futures | 2026-07-11 | 2026 CA Metro Championships-LKWD LCvenue |
| 100 Freestyle | LCM | 57.73 | AA+2.14s to AAA·Sectionals ✓+4.14s to Futures | 2026-07-12 | 2026 CA Metro Championships-LKWD LCvenue |
| 200 Freestyle | LCM | 2:06.23 | AA+4.04s to AAA·Sectionals ✓+8.44s to Futures | 2026-07-24 | 2026 CA SCS Summer A/G Champsvenue |
| 400 Freestyle | LCM | 4:40.23 | A+7.84s to AA·+5.84s to Sectionals | 2026-07-11 | 2026 CA Metro Championships-LKWD LCvenue |
| 100 Breaststroke | LCM | 1:15.15 | A+2.76s to AA·+1.45s to Sectionals | 2026-07-24 | 2026 CA SCS Summer A/G Champsvenue |
| 200 Breaststroke | LCM | 2:47.91 | BB+3.22s to A·+7.03s to Sectionals | 2026-06-14 | ARMADA-2026 SCS June AG Invitevenue |
| 50 Butterfly | LCM | 27.80 | AA+0.11s to AAA·+1.51s to Futures | 2026-07-26 | 2026 CA SCS Summer A/G Champsvenue |
| 100 Butterfly | LCM | 1:02.28 | AA+2.59s to AAA·Sectionals ✓+4.29s to Futures | 2025-07-13 | 2025 Metro Committee Summer Championshipsvenue |
| 200 Butterfly | LCM | 2:28.60 | BB+3.21s to A·+7.51s to Sectionals | 2025-07-24 | 2025 CA SCS/RAA Summer A/G Champsvenue |
| 200 Individual Medley | LCM | 2:23.67 | A+1.28s to AA·Sectionals ✓+10.88s to Futures | 2026-07-25 | 2026 CA SCS Summer A/G Champsvenue |
| 400 Individual Medley | LCM | 5:13.04 | A+7.35s to AA·+5.25s to Sectionals | 2025-07-25 | 2025 CA SCS/RAA Summer A/G Champsvenue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 17.
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 | SCY | 24.19 | flat | 200 Free Relay | 2024-12-14 | 2024 CA GWSC/SCS WAG |
| 50 Freestyle | SCY | 23.81 | flying | 200 Medley Relay (leg 4) | 2026-02-15 | 2026 Metro Champs @ La Mirada Armada |
| 50 Freestyle | SCY | 23.03 | flying | 200 Free Relay (leg 4) | 2025-12-12 | 2025 CA SCS/RAA WAG |
| 100 Freestyle | SCY | 51.76 | flying | 400 Free Relay (leg 3) | 2024-12-15 | 2024 CA GWSC/SCS WAG |
| 200 Freestyle | SCY | 2:01.20 | flat | 800 Free Relay | 2024-12-13 | 2024 CA GWSC/SCS WAG |
| 50 Breaststroke | SCY | 28.19 | flying | 200 Medley Relay (leg 2) | 2025-02-15 | 2025 Metro Sc Champs at Armada |
| 50 Butterfly | SCY | 24.80 | flying | 200 Medley Relay (leg 3) | 2025-12-14 | 2025 CA SCS/RAA WAG |
| 100 Butterfly | SCY | 1:03.83 | flying | 400 Medley Relay (leg 3) | 2024-12-14 | 2024 CA GWSC/SCS WAG |
| 50 Freestyle | LCM | 26.53 | flat | 200 Free Relay | 2026-07-24 | 2026 CA SCS Summer A/G Champs |
| 100 Freestyle | LCM | 57.20 | flat | 400 Free Relay | 2026-07-26 | 2026 CA SCS Summer A/G Champs |
| 100 Freestyle | LCM | 58.09 | flying | 400 Free Relay (leg 4) | 2026-07-12 | 2026 CA Metro Championships-LKWD LC |
| 200 Freestyle | LCM | 2:09.15 | flying | 800 Free Relay (leg 2) | 2025-07-24 | 2025 CA SCS/RAA Summer A/G Champs |
| 100 Breaststroke | LCM | 1:14.98 | flying | 400 Medley Relay (leg 2) | 2026-07-25 | 2026 CA SCS Summer A/G Champs |
| 50 Butterfly | LCM | 26.71 | flying | 200 Medley Relay (leg 3) | 2025-07-25 | 2025 CA SCS/RAA Summer A/G Champs |
| 100 Butterfly | LCM | 1:03.03 | flying | 400 Medley Relay (leg 3) | 2025-07-26 | 2025 CA SCS/RAA Summer A/G 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 · SCY
3892 points (6/6 events)
| Event | Time | Points |
|---|---|---|
| 500 FR SCY | 5:04.52 | 715 |
| 200 BK SCY | 2:19.48 | 462 |
| 200 BR SCY | 2:23.00 | 616 |
| 200 FL SCY | 2:02.81 | 714 |
| 200 IM SCY | 2:05.58 | 682 |
| 400 IM SCY | 4:27.61 | 703 |
IMR 17-18 · SCY
3288 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 1:50.42 | 747 |
| 100 BK SCY | 1:03.28 | 461 |
| 100 BR SCY | 1:03.98 | 670 |
| 100 FL SCY | 54.55 | 728 |
| 200 IM SCY | 2:05.58 | 682 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 51.87
Front half 24.51s · back half 27.36s
200 Freestyle SCY 1:50.42
Front half 52.34s · back half 58.08s
500 Freestyle SCY 5:04.52
Front half 148.67s · back half 155.85s
100 Backstroke SCY 1:03.28
Front half 30.31s · back half 32.97s
100 Breaststroke SCY 1:03.98
Front half 30.13s · back half 33.85s
200 Breaststroke SCY 2:23.00
Front half 68.14s · back half 74.86s
100 Butterfly SCY 54.55
Front half 25.42s · back half 29.13s
200 Butterfly SCY 2:02.81
Front half 57.73s · back half 65.08s
200 Individual Medley SCY 2:05.58
Front half 59.70s · back half 65.88s
400 Individual Medley SCY 4:27.61
Front half 129.71s · back half 137.90s
100 Freestyle LCM 57.73
Front half 27.81s · back half 29.92s
200 Freestyle LCM 2:06.23
Front half 60.45s · back half 65.78s
400 Freestyle LCM 4:40.23
Front half 138.70s · back half 141.53s
100 Breaststroke LCM 1:15.15
Front half 35.32s · back half 39.83s
200 Breaststroke LCM 2:47.91
Front half 79.29s · back half 88.62s
100 Butterfly LCM 1:02.28
Front half 29.02s · back half 33.26s
200 Butterfly LCM 2:28.60
Front half 65.26s · back half 83.34s
200 Individual Medley LCM 2:23.67
Front half 69.25s · back half 74.42s
400 Individual Medley LCM 5:13.04
Front half 151.85s · back half 161.19s
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.
Swim history
Every recorded swim, newest first
| Date | Event | Course | Time | Age | Round | Meet |
|---|
Individual swims with a recorded date and time — including disqualifications — plus reconstructed relay legs (marked). Assembled in the browser from this page’s data.
Progression
Faster times are higher. One card per event, all courses & history.