swimWilliam Cheng
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 25.53 | BB+0.84s to A | 2026-02-07 | 2026 PVST Coastal vs. Cancer venue |
| 100 Freestyle | SCY | 55.29 | BB+1.00s to A | 2026-05-31 | PVST Splash Into Summer fast pool |
| 200 Freestyle | SCY | 2:06.45 | BB+7.86s to A | 2026-03-07 | PVST March Madness venue |
| 500 Freestyle | SCY | 5:46.41 | BB+23.82s to A | 2026-02-08 | 2026 PVST Coastal vs. Cancer venue |
| 50 Backstroke | SCY | 29.80 | BB+1.81s to A | 2025-11-01 | 55th Annual David Graham Memorial Meet venue |
| 100 Backstroke | SCY | 1:04.15 | BB+4.56s to A | 2026-05-31 | PVST Splash Into Summer fast pool |
| 200 Backstroke | SCY | 2:20.64 | BB+10.55s to A | 2026-02-08 | 2026 PVST Coastal vs. Cancer venue |
| 50 Breaststroke | SCY | 39.13 | +1.64s to B | 2025-11-01 | 55th Annual David Graham Memorial Meet venue |
| 100 Breaststroke | SCY | 1:24.65 | +6.06s to B | 2025-10-12 | 2025 CA Paseo Fall Kickoff Season Opener venue |
| 50 Butterfly | SCY | 27.12 | A+0.53s to AA | 2026-05-31 | PVST Splash Into Summer fast pool |
| 100 Butterfly | SCY | 1:00.80 | BB+1.91s to A | 2026-02-08 | 2026 PVST Coastal vs. Cancer venue |
| 200 Butterfly | SCY | 2:22.04 | BB+10.05s to A | 2026-05-30 | PVST Splash Into Summer fast pool |
| 200 Individual Medley | SCY | 2:30.21 | B+7.02s to BB | 2025-10-12 | 2025 CA Paseo Fall Kickoff Season Opener venue |
| 400 Individual Medley | SCY | 5:24.72 | B+16.83s to BB | 2025-11-15 | PVST Harvest Heats venue |
| 50 Freestyle | LCM | 28.78 | BB+0.19s to A | 2026-06-28 | 2026 CA SBSC Semana Nautica LC Meet venue |
| 100 Freestyle | LCM | 1:05.08 | BB+2.79s to A | 2026-05-23 | BUEN Memorial Day LC Meet venue |
| 200 Freestyle | LCM | 2:24.41 | BB+7.22s to A | 2026-05-23 | BUEN Memorial Day LC Meet venue |
| 400 Freestyle | LCM | 5:15.74 | BB+23.65s to A | 2026-04-11 | 2026 BUEN LCM Opener venue |
| 50 Backstroke | LCM | 35.11 | BB+1.92s to A | 2025-07-16 | Renee and Jim Patterson Meet 2025 |
| 100 Backstroke | LCM | 1:16.94 | B+1.55s to BB | 2026-04-12 | 2026 BUEN LCM Opener venue |
| 200 Backstroke | LCM | 2:44.05 | B+0.36s to BB | 2026-06-27 | 2026 CA SBSC Semana Nautica LC Meet venue |
| 50 Breaststroke | LCM | 46.41 | +3.82s to B | 2026-04-25 | 2026 SBSC April LC Pentathlon venue |
| 100 Breaststroke | LCM | 1:41.00 | +9.61s to B | 2026-04-26 | 2026 SBSC April LC Pentathlon venue |
| 50 Butterfly | LCM | 31.24 | A+1.25s to AA | 2026-05-24 | BUEN Memorial Day LC Meet venue |
| 100 Butterfly | LCM | 1:09.56 | BB+2.27s to A | 2026-06-28 | 2026 CA SBSC Semana Nautica LC Meet venue |
| 200 Individual Medley | LCM | 2:43.33 | BB+10.14s to A | 2026-06-27 | 2026 CA SBSC Semana Nautica LC Meet venue |
| 400 Individual Medley | LCM | 6:01.14 | B+4.45s to BB | 2026-06-26 | 2026 CA SBSC Semana Nautica LC Meet venue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 15.
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 | 30.13 | flat | 200 Free Relay | 2025-07-19 | Renee and Jim Patterson Meet 2025 |
| 50 Freestyle | LCM | 29.38 | flying | 200 Medley Relay (leg 4) | 2025-07-19 | Renee and Jim Patterson Meet 2025 |
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 15-16 · SCY
2331 points (5/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 500 FR SCY | 5:46.41 | 507 |
| 200 BK SCY | 2:20.64 | 487 |
| 200 FL SCY | 2:22.04 | 499 |
| 200 IM SCY | 2:30.21 | 427 |
| 400 IM SCY | 5:24.72 | 411 |
| 200 BR SCY | — | 0 |
IMR 15-16 · LCM
2388 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR LCM | 2:24.41 | 538 |
| 100 BK LCM | 1:16.94 | 462 |
| 100 BR LCM | 1:41.00 | 293 |
| 100 FL LCM | 1:09.56 | 567 |
| 200 IM LCM | 2:43.33 | 528 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 55.29
Front half 27.28s · back half 28.01s
200 Freestyle SCY 2:06.45
Front half 62.14s · back half 64.31s
500 Freestyle SCY 5:46.41
Front half 170.79s · back half 175.62s
100 Backstroke SCY 1:04.15
Front half 31.31s · back half 32.84s
200 Backstroke SCY 2:20.64
Front half 67.76s · back half 72.88s
100 Breaststroke SCY 1:24.65
Front half 39.51s · back half 45.14s
100 Butterfly SCY 1:00.80
Front half 28.12s · back half 32.68s
200 Butterfly SCY 2:22.04
Front half 65.81s · back half 76.23s
200 Individual Medley SCY 2:30.21
Front half 70.56s · back half 79.65s
400 Individual Medley SCY 5:24.72
Front half 150.67s · back half 174.05s
200 Freestyle LCM 2:24.41
Front half 68.45s · back half 75.96s
400 Freestyle LCM 5:15.74
Front half 151.88s · back half 163.86s
100 Backstroke LCM 1:16.94
Front half 37.02s · back half 39.92s
200 Backstroke LCM 2:44.05
Front half 80.61s · back half 83.44s
100 Butterfly LCM 1:09.56
Front half 32.11s · back half 37.45s
200 Individual Medley LCM 2:43.33
Front half 75.41s · back half 87.92s
400 Individual Medley LCM 6:01.14
Front half 167.57s · back half 193.57s
Progression
Faster times are higher. One card per event, all courses & history.