swimMason Matsui
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 30.20 | +0.31s to B·+7.01s to Sectionals | 2026-06-07 | 2025 SVYT YSCB Summer Splashvenue |
| 100 Freestyle | SCY | 1:08.36 | +3.27s to B·+17.37s to Sectionals | 2026-08-08 | 2026 SVYT Pentathlon |
| 50 Backstroke | SCY | 37.46 | +3.77s to B·+13.77s to Futures | 2026-08-08 | 2026 SVYT Pentathlon |
| 50 Breaststroke | SCY | 38.59 | B+2.80s to BB·+12.30s to Futures | 2026-08-08 | 2026 SVYT Pentathlon |
| 100 Breaststroke | SCY | 1:23.36 | +2.77s to B·+20.17s to Sectionals | 2026-08-08 | 2026 SVYT Pentathlon |
| 50 Butterfly | SCY | 35.51 | +2.32s to B·+12.62s to Futures | 2026-08-08 | 2026 SVYT Pentathlon |
| 100 Individual Medley | SCY | 1:20.29 | 2026-05-16 | 2026 PN (PSSA) BYST Spring Fling- Approvedvenue | |
| 50 Freestyle | LCM | 50.83 | +16.54s to B·+23.84s to Sectionals | 2021-06-06 | 2021 IE VS Apple Capitalslow pool |
| 100 Freestyle | LCM | 1:55.05 | +39.96s to B·+56.06s to Sectionals | 2021-06-05 | 2021 IE VS Apple Capitalslow pool |
| 50 Backstroke | LCM | 58.57 | +19.08s to B·+30.68s to Futures | 2021-06-05 | 2021 IE VS Apple Capitalslow pool |
| 100 Backstroke | LCM | 2:04.34 | +40.65s to B·+59.15s to Sectionals | 2021-06-06 | 2021 IE VS Apple Capitalslow pool |
| 50 Breaststroke | LCM | 1:11.78 | +27.69s to B·+40.89s to Futures | 2021-06-05 | 2021 IE VS Apple Capitalslow pool |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 14.
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 | 29.26 | flying | 200 Medley Relay (leg 4) | 2026-06-07 | 2025 SVYT YSCB Summer Splash |
| 50 Freestyle | SCY | 30.11 | flying | 200 Free Relay (leg 2) | 2026-05-16 | 2026 Spring Fling Swim Meet |
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
IMR 13-14 · SCY
380 points (1/5 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 100 BR SCY | 1:23.36 | 380 |
| 200 FR SCY | — | 0 |
| 100 BK SCY | — | 0 |
| 100 FL SCY | — | 0 |
| 200 IM SCY | — | 0 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Individual Medley SCY 1:20.29
Front half 39.06s · back half 41.23s
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.