swimIsaac Chang
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 21.59 | AAA+0.90s to AAAA·Sectionals ✓+0.30s to Futures | 2026-02-15 | 2026 MVN Lunar AAPI Festivalvenue |
| 100 Freestyle | SCY | 46.54 | AAA+1.05s to AAAA·Sectionals ✓+0.15s to Futures | 2026-02-14 | 2026 MVN Lunar AAPI Festivalvenue |
| 200 Freestyle | SCY | 1:42.83 | AAA+2.24s to AAAA·Sectionals ✓+1.24s to Futures | 2025-11-08 | 2025 Legends of Coaching Series_Peter Dalandvenue |
| 500 Freestyle | SCY | 4:47.31 | AA+0.62s to AAA·Sectionals ✓+10.22s to Futures | 2025-11-16 | BCA Fall Festivalvenue |
| 50 Backstroke | SCY | 24.86 | AA+0.57s to AAA·+1.17s to Futures | 2025-09-14 | BCA Fall Intersquadvenue |
| 100 Backstroke | SCY | 53.42 | AA+1.83s to AAA·Sectionals ✓+1.93s to Futures | 2025-09-21 | 2025 TSM Aquatics Season Openervenue |
| 200 Backstroke | SCY | 1:57.08 | AA+3.59s to AAA·Sectionals ✓+4.29s to Futures | 2024-11-10 | 2024 Legends of Coaching Series-Kevin Perryvenue |
| 50 Breaststroke | SCY | 26.88 | AAA+0.19s to AAAA·+0.59s to Futures | 2025-09-14 | BCA Fall Intersquadvenue |
| 100 Breaststroke | SCY | 55.78 | AAAA·Futures ✓+0.29s to Winter JNs | 2026-02-27 | 2026 SI CA/NV Speedo Sectionals Oceansidevenue |
| 200 Breaststroke | SCY | 2:03.42 | AAA+1.23s to AAAA·Futures ✓+1.83s to Winter JNs | 2025-11-09 | 2025 Legends of Coaching Series_Peter Dalandvenue |
| 50 Butterfly | SCY | 22.72 | AAAA·Futures ✓+0.73s to Jr Nationals | 2025-10-26 | TORR Spooky Splashvenue |
| 100 Butterfly | SCY | 49.26 | AAA+0.07s to AAAA·Futures ✓+0.57s to Winter JNs | 2025-12-12 | 2025 West Speedo Winter Juniorsfast pool |
| 200 Butterfly | SCY | 1:48.64 | AAAA·Winter JNs ✓+0.75s to Jr Nationals | 2026-02-28 | 2026 SI CA/NV Speedo Sectionals Oceansidevenue |
| 100 Individual Medley | SCY | 52.51 | 2025-09-14 | BCA Fall Intersquadvenue | |
| 200 Individual Medley | SCY | 1:50.76 | AAAA·Futures ✓+1.17s to Winter JNs | 2025-12-11 | 2025 West Speedo Winter Juniorsfast pool |
| 400 Individual Medley | SCY | 4:03.01 | AAA+3.62s to AAAA·Futures ✓+6.52s to Winter JNs | 2025-10-25 | TORR Spooky Splashvenue |
| 50 Freestyle | LCM | 25.44 | AA+0.35s to AAA·Sectionals ✓+0.85s to Futures | 2025-06-01 | CITI Summer Sizzlervenue |
| 100 Freestyle | LCM | 55.62 | AA+0.43s to AAA·Sectionals ✓+2.03s to Futures | 2025-06-13 | 2025 SCS June AG Invite @ La Mirada Armadavenue |
| 200 Freestyle | LCM | 2:03.91 | AA+3.22s to AAA·Sectionals ✓+6.12s to Futures | 2025-04-12 | 2025 CA MVN Fran Crippen SMOCvenue |
| 100 Backstroke | LCM | 1:02.53 | AA+1.14s to AAA·Sectionals ✓+1.94s to Futures | 2025-07-11 | 2025 LAI Entriesvenue |
| 50 Breaststroke | LCM | 30.47 | AAAA·Futures ✓+0.88s to Jr Nationals | 2025-07-31 | 2025 Speedo Junior National Championshipsfast pool |
| 100 Breaststroke | LCM | 1:05.12 | AAAA·Winter JNs ✓+0.03s to Jr Nationals | 2025-07-30 | 2025 Speedo Junior National Championshipsfast pool |
| 200 Breaststroke | LCM | 2:24.72 | AAA+1.83s to AAAA·Futures ✓+0.63s to Winter JNs | 2025-08-02 | 2025 Speedo Junior National Championshipsfast pool |
| 50 Butterfly | LCM | 26.90 | AAA+0.81s to AAAA·+0.61s to Futures | 2026-06-06 | 2026 BCA June LC Meetvenue |
| 100 Butterfly | LCM | 56.89 | AAA+0.60s to AAAA·Futures ✓+0.40s to Winter JNs | 2026-05-23 | 2026 CA 30th NOVA-Speedo Grand Challengevenue |
| 200 Butterfly | LCM | 2:19.03 | A+1.14s to AA·Sectionals ✓+8.84s to Futures | 2024-03-02 | 2024 CA/NV Speedo Sectionalvenue |
| 200 Individual Medley | LCM | 2:13.95 | AAA+4.36s to AAAA·Sectionals ✓+1.16s to Futures | 2024-07-27 | 2024 USAS Futures Championships-Minneapolisvenue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 18.
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 | 21.70 | flying | 200 Medley Relay (leg 4) | 2024-12-21 | 2024 CA-NV December Sectionals At BREA |
| 50 Freestyle | SCY | 20.76 | flying | 200 Free Relay (leg 4) | 2026-02-26 | 2026 SI CA/NV Speedo Sectionals Oceanside |
| 100 Freestyle | SCY | 45.77 | flying | 400 Free Relay (leg 4) | 2026-03-01 | 2026 SI CA/NV Speedo Sectionals Oceanside |
| 200 Freestyle | SCY | 1:44.58 | flat | 800 Free Relay | 2024-12-13 | 2024 CA SCAT/SCS WAG |
| 200 Freestyle | SCY | 1:41.63 | flying | 800 Free Relay (leg 3) | 2025-12-10 | 2025 West Speedo Winter Juniors |
| 50 Breaststroke | SCY | 27.36 | flying | 200 Medley Relay (leg 2) | 2024-12-15 | 2024 CA SCAT/SCS WAG |
| 100 Breaststroke | SCY | 56.24 | flying | 400 Medley Relay (leg 2) | 2026-02-27 | 2026 SI CA/NV Speedo Sectionals Oceanside |
| 50 Butterfly | SCY | 21.73 | flying | 200 Medley Relay (leg 3) | 2026-02-28 | 2026 SI CA/NV Speedo Sectionals Oceanside |
| 100 Butterfly | SCY | 48.79 | flying | 400 Medley Relay (leg 3) | 2025-12-11 | 2025 West Speedo Winter Juniors |
| 100 Freestyle | LCM | 55.44 | flat | 400 Free Relay | 2024-03-03 | 2024 CA/NV Speedo Sectional |
| 200 Freestyle | LCM | 2:06.20 | flying | 800 Free Relay (leg 3) | 2024-02-29 | 2024 CA/NV Speedo Sectional |
| 50 Butterfly | LCM | 26.31 | flying | 200 Medley Relay (leg 3) | 2025-06-15 | 2025 SCS June AG Invite @ La Mirada Armada |
| 100 Butterfly | LCM | 1:00.37 | flying | 400 Medley Relay (leg 3) | 2024-03-01 | 2024 CA/NV Speedo Sectional |
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
5558 points (6/6 events)
| Event | Time | Points |
|---|---|---|
| 500 FR SCY | 4:47.31 | 852 |
| 200 BK SCY | 1:57.08 | 782 |
| 200 BR SCY | 2:03.42 | 958 |
| 200 FL SCY | 1:48.64 | 1032 |
| 200 IM SCY | 1:50.76 | 995 |
| 400 IM SCY | 4:03.01 | 939 |
IMR 17-18 · SCY
4685 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 1:42.83 | 924 |
| 100 BK SCY | 53.42 | 766 |
| 100 BR SCY | 55.78 | 1011 |
| 100 FL SCY | 49.26 | 989 |
| 200 IM SCY | 1:50.76 | 995 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 46.54
Front half 22.47s · back half 24.07s
200 Freestyle SCY 1:42.83
Front half 50.34s · back half 52.49s
500 Freestyle SCY 4:47.31
Front half 144.09s · back half 143.22s
100 Backstroke SCY 53.42
Front half 25.94s · back half 27.48s
200 Backstroke SCY 1:57.08
Front half 56.98s · back half 60.10s
100 Breaststroke SCY 55.78
Front half 26.60s · back half 29.18s
200 Breaststroke SCY 2:03.42
Front half 58.62s · back half 64.80s
100 Butterfly SCY 49.26
Front half 23.04s · back half 26.22s
200 Butterfly SCY 1:48.64
Front half 52.58s · back half 56.06s
200 Individual Medley SCY 1:50.76
Front half 53.18s · back half 57.58s
400 Individual Medley SCY 4:03.01
Front half 118.71s · back half 124.30s
200 Freestyle LCM 2:03.91
Front half 59.68s · back half 64.23s
100 Breaststroke LCM 1:05.12 RT 0.60s
Front half 30.86s · back half 34.26s
200 Breaststroke LCM 2:24.72 RT 0.59s
Front half 69.19s · back half 75.53s
100 Butterfly LCM 56.89
Front half 27.20s · back half 29.69s
200 Butterfly LCM 2:19.03
Front half 66.63s · back half 72.40s
200 Individual Medley LCM 2:13.95
Front half 62.37s · back half 71.58s
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.