swimIsaac Zhang
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 24.30 | AA+0.81s to AAA | 2024-11-24 | 2024 ST TXLA 11&Over November Unclassified venue |
| 100 Freestyle | SCY | 52.80 | AA+1.61s to AAA | 2025-12-07 | 2025 ST LSAC 5th Annual Graceland venue |
| 200 Freestyle | SCY | 2:00.36 | A+3.27s to AA | 2024-10-19 | 2024 ST ASC Bob Thompson Open venue |
| 50 Backstroke | SCY | 27.67 | AA+1.18s to AAA | 2024-09-22 | 2024 ST WLOO Short Course Kick Off slow pool |
| 100 Backstroke | SCY | 58.71 | A+0.12s to AA | 2026-01-11 | 2026 ST TXLA New Year's Classic Invite venue |
| 200 Backstroke | SCY | 2:08.26 | A+0.77s to AA | 2025-01-18 | 2025 ST TXLA New Year's Classic venue |
| 100 Breaststroke | SCY | 1:09.10 | BB+0.01s to A | 2024-11-24 | 2024 ST TXLA 11&Over November Unclassified venue |
| 50 Butterfly | SCY | 25.14 | AAA+0.25s to AAAA | 2025-12-06 | 2025 ST LSAC 5th Annual Graceland venue |
| 100 Butterfly | SCY | 58.11 | A+0.22s to AA | 2025-02-23 | 2025 ST AAAA STAGS Championship venue |
| 100 Individual Medley | SCY | 57.91 | 2025-12-06 | 2025 ST LSAC 5th Annual Graceland venue | |
| 200 Individual Medley | SCY | 2:12.20 | A+2.41s to AA | 2025-02-23 | 2025 ST AAAA STAGS Championship venue |
| 400 Individual Medley | SCY | 4:50.59 | BB+1.10s to A | 2025-02-21 | 2025 ST AAAA STAGS Championship venue |
| 50 Freestyle | LCM | 27.32 | AA+0.43s to AAA | 2025-05-18 | 2025 ST ASC Spring Showcase venue |
| 100 Freestyle | LCM | 59.49 | AA+0.50s to AAA | 2025-07-11 | 2025 ST AAAA STAGS LC Championship venue |
| 200 Freestyle | LCM | 2:15.27 | A+0.58s to AA | 2025-07-12 | 2025 ST AAAA STAGS LC Championship venue |
| 400 Freestyle | LCM | 4:59.88 | A+12.39s to AA | 2025-05-17 | 2025 ST ASC Spring Showcase venue |
| 1500 Freestyle | LCM | 20:31.55 | BB+38.96s to A | 2024-05-18 | 2024 ST AAAA NS Salute to the Troops venue |
| 50 Backstroke | LCM | 31.32 | AA+0.23s to AAA | 2025-07-13 | 2025 ST AAAA STAGS LC Championship venue |
| 100 Backstroke | LCM | 1:07.02 | AA+1.23s to AAA | 2025-07-12 | 2025 ST AAAA STAGS LC Championship venue |
| 200 Backstroke | LCM | 2:26.45 | AA+3.46s to AAA | 2025-07-11 | 2025 ST AAAA STAGS LC Championship venue |
| 50 Breaststroke | LCM | 38.25 | BB+0.46s to A | 2025-04-27 | 2025 ST WLOO Waterloo Classic venue |
| 100 Breaststroke | LCM | 1:23.32 | BB+2.73s to A | 2024-06-23 | 2024 ST WLOO LC Last Chance venue |
| 200 Breaststroke | LCM | 3:07.02 | BB+12.23s to A | 2025-04-13 | 2025 ST TXLA 11& Over Long Course Kick Off venue |
| 50 Butterfly | LCM | 30.45 | AA+1.16s to AAA | 2025-04-27 | 2025 ST WLOO Waterloo Classic venue |
| 100 Butterfly | LCM | 1:06.45 | A+0.46s to AA | 2025-07-13 | 2025 ST AAAA STAGS LC Championship venue |
| 200 Butterfly | LCM | 2:44.70 | BB+10.31s to A | 2024-05-19 | 2024 ST AAAA NS Salute to the Troops venue |
| 200 Individual Medley | LCM | 2:29.18 | AA+5.39s to AAA | 2025-05-17 | 2025 ST ASC Spring Showcase venue |
| 400 Individual Medley | LCM | 5:24.52 | A+3.03s to AA | 2024-07-11 | 2024 ST Long Course STAGS Championship venue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 14.
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 | 27.29 | flying | 200 Free Relay (leg 3) | 2025-07-20 | 2025 Texas Age Group Championships |
| 100 Freestyle | LCM | 1:00.78 | flying | 400 Free Relay (leg 3) | 2025-07-18 | 2025 Texas Age Group Championships |
| 50 Backstroke | LCM | 31.49 | flat | 200 Medley Relay | 2025-07-19 | 2025 Texas Age Group Championships |
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 · LCM
4063 points (6/6 events)
| Event | Time | Points |
|---|---|---|
| 400 FR LCM | 4:59.88 | 661 |
| 200 BK LCM | 2:26.45 | 805 |
| 200 BR LCM | 3:07.02 | 537 |
| 200 FL LCM | 2:44.70 | 548 |
| 200 IM LCM | 2:29.18 | 777 |
| 400 IM LCM | 5:24.52 | 735 |
IMR 13-14 · LCM
3696 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR LCM | 2:15.27 | 751 |
| 100 BK LCM | 1:07.02 | 822 |
| 100 BR LCM | 1:23.32 | 600 |
| 100 FL LCM | 1:06.45 | 746 |
| 200 IM LCM | 2:29.18 | 777 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 52.80
Front half 25.48s · back half 27.32s
200 Freestyle SCY 2:00.36
Front half 58.15s · back half 62.21s
100 Backstroke SCY 58.71
Front half 28.49s · back half 30.22s
200 Backstroke SCY 2:08.26
Front half 61.78s · back half 66.48s
100 Breaststroke SCY 1:09.10
Front half 32.05s · back half 37.05s
100 Butterfly SCY 58.11
Front half 27.43s · back half 30.68s
100 Individual Medley SCY 57.91
Front half 26.11s · back half 31.80s
200 Individual Medley SCY 2:12.20
Front half 60.89s · back half 71.31s
400 Individual Medley SCY 4:50.59
Front half 135.26s · back half 155.33s
200 Freestyle LCM 2:15.27
Front half 64.71s · back half 70.56s
400 Freestyle LCM 4:59.88
Front half 145.19s · back half 154.69s
1500 Freestyle LCM 20:31.55
Front half 609.72s · back half 621.83s
100 Backstroke LCM 1:07.02
Front half 31.72s · back half 35.30s
200 Backstroke LCM 2:26.45
Front half 70.68s · back half 75.77s
200 Breaststroke LCM 3:07.02
Front half 87.35s · back half 99.67s
200 Butterfly LCM 2:44.70
Front half 79.64s · back half 85.06s
200 Individual Medley LCM 2:29.18
Front half 68.62s · back half 80.56s
400 Individual Medley LCM 5:24.52
Front half 149.43s · back half 175.09s
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.