swimWilliam Chong
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 23.45 | A+0.76s to AA | 2025-09-27 | 2025 PVST Pentathlon venue |
| 100 Freestyle | SCY | 49.26 | AA+1.57s to AAA | 2026-04-09 | 2026 Far Western SC Hosted By SCSC venue |
| 200 Freestyle | SCY | 1:48.90 | AA+3.51s to AAA | 2026-02-13 | 2026 SI Presidents' Day Senior Classic - copi |
| 500 Freestyle | SCY | 5:04.05 | A+4.36s to AA | 2025-02-14 | 2025 SI Presidents' Day Senior Classic |
| 50 Backstroke | SCY | 27.33 | BB+0.84s to A | 2026-02-13 | 2026 SI Presidents' Day Senior Classic - copi |
| 100 Backstroke | SCY | 59.35 | BB+3.16s to A | 2024-02-18 | 2024 President's Day Senior Classic Meet venue |
| 200 Backstroke | SCY | 2:05.76 | BB+1.97s to A | 2026-02-13 | 2026 SI Presidents' Day Senior Classic - copi |
| 50 Breaststroke | SCY | 30.27 | A+0.98s to AA | 2026-02-13 | 2026 SI Presidents' Day Senior Classic - copi |
| 100 Breaststroke | SCY | 1:06.15 | BB+1.96s to A | 2025-02-14 | 2025 SI Presidents' Day Senior Classic |
| 200 Breaststroke | SCY | 2:24.04 | BB+4.45s to A | 2026-02-13 | 2026 SI Presidents' Day Senior Classic - copi |
| 100 Butterfly | SCY | 58.87 | BB+2.68s to A | 2025-10-11 | 2025 CA Paseo Fall Kickoff Season Opener venue |
| 200 Individual Medley | SCY | 2:08.78 | BB+1.99s to A | 2025-11-01 | 55th Annual David Graham Memorial Meet venue |
| 400 Individual Medley | SCY | 5:03.44 | B+7.05s to BB | 2025-02-23 | 2025 CA BUENA Coastal Championship slow pool |
| 50 Freestyle | LCM | 28.00 | BB+0.61s to A | 2025-05-24 | Canyons 15th Annual Red, White and Blue Mem venue |
| 100 Freestyle | LCM | 58.42 | A+0.73s to AA | 2024-07-25 | 2024 CA SCS/ BREA Summer A/G Champs slow pool |
| 800 Freestyle | LCM | 9:49.03 | BB+1.34s to A | 2024-07-28 | 2024 CA SCS/ BREA Summer A/G Champs slow pool |
| 1500 Freestyle | LCM | 19:06.38 | BB+21.69s to A | 2024-07-25 | 2024 CA SCS/ BREA Summer A/G Champs slow pool |
| 100 Backstroke | LCM | 1:10.61 | BB+3.62s to A | 2024-07-28 | 2024 CA SCS/ BREA Summer A/G Champs slow pool |
| 200 Backstroke | LCM | 2:34.72 | BB+8.83s to A | 2024-07-25 | 2024 CA SCS/ BREA Summer A/G Champs slow pool |
| 100 Breaststroke | LCM | 1:27.65 | +0.56s to B | 2025-05-24 | Canyons 15th Annual Red, White and Blue Mem venue |
| 200 Breaststroke | LCM | 3:02.60 | B+5.71s to BB | 2025-05-25 | Canyons 15th Annual Red, White and Blue Mem venue |
| 100 Butterfly | LCM | 1:09.82 | B+0.13s to BB | 2025-05-24 | Canyons 15th Annual Red, White and Blue Mem venue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 18.
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 | 24.18 | flat | 200 Free Relay | 2024-05-04 | 2024 City CIF SWIMMING & DIVING CHAMP USA DQs |
| 50 Freestyle | SCY | 24.03 | flying | 200 Free Relay (leg 2) | 2025-02-22 | 2025 CA BUENA Coastal Championship |
| 100 Freestyle | SCY | 47.92 | flying | 400 Free Relay (leg 3) | 2026-02-16 | 2026 SI Presidents' Day Senior Classic - copi |
| 200 Freestyle | SCY | 1:57.64 | flat | 800 Free Relay | 2024-12-13 | 2024 CA RAA/SCS WAG |
| 50 Breaststroke | SCY | 31.84 | flying | 200 Medley Relay (leg 2) | 2025-02-23 | 2025 CA BUENA Coastal Championship |
| 50 Freestyle | LCM | 25.30 | flying | 200 Free Relay (leg 2) | 2024-07-26 | 2024 CA SCS/ BREA 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
3067 points (5/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 500 FR SCY | 5:04.05 | 719 |
| 200 BK SCY | 2:05.76 | 631 |
| 200 BR SCY | 2:24.04 | 602 |
| 200 IM SCY | 2:08.78 | 633 |
| 400 IM SCY | 5:03.44 | 482 |
| 200 FL SCY | — | 0 |
IMR 17-18 · SCY
3154 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 1:48.90 | 778 |
| 100 BK SCY | 59.35 | 558 |
| 100 BR SCY | 1:06.15 | 606 |
| 100 FL SCY | 58.87 | 579 |
| 200 IM SCY | 2:08.78 | 633 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 49.26
Front half 23.74s · back half 25.52s
100 Backstroke SCY 59.35
Front half 28.88s · back half 30.47s
100 Butterfly SCY 58.87
Front half 27.62s · back half 31.25s
200 Individual Medley SCY 2:08.78
Front half 59.77s · back half 69.01s
400 Individual Medley SCY 5:03.44
Front half 149.12s · back half 154.32s
800 Freestyle LCM 9:49.03 RT 0.71s
Front half 294.17s · back half 294.86s
1500 Freestyle LCM 19:06.38 RT 0.59s
200 Backstroke LCM 2:34.72 RT 0.66s
Front half 74.65s · back half 80.07s
100 Breaststroke LCM 1:27.65
Front half 37.40s · back half 50.25s
200 Breaststroke LCM 3:02.60
Front half 88.26s · back half 94.34s
100 Butterfly LCM 1:09.82
Front half 37.68s · back half 32.14s
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.