swimJocelyn Hayashi
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 23.87 | AAAA·Futures ✓+0.58s to Winter JNs | 2026-03-13 | 2026 Speedo Sectionals (North) - West Fargovenue |
| 100 Freestyle | SCY | 52.32 | AAA+0.33s to AAAA·Sectionals ✓+0.43s to Futures | 2026-03-15 | 2026 Speedo Sectionals (North) - West Fargovenue |
| 200 Freestyle | SCY | 2:02.39 | AA+5.00s to AAA·+4.50s to Sectionals | 2024-03-08 | 2024 IL Swimming SC Age Group Championshipsslow pool |
| 50 Backstroke | SCY | 25.90 | AAAA·Futures ✓+0.71s to Jr Nationals | 2025-03-06 | 2025 SC Illinois Senior Championshipsvenue |
| 100 Backstroke | SCY | 55.14 | AAAA·Futures ✓+0.05s to Winter JNs | 2024-11-24 | 2024 Speedo Grand Chalengevenue |
| 200 Backstroke | SCY | 2:03.81 | AAA+1.92s to AAAA·Futures ✓+4.42s to Winter JNs | 2024-11-23 | 2024 Speedo Grand Chalengevenue |
| 50 Butterfly | SCY | 24.99 | AAAA·Futures ✓+0.30s to Jr Nationals | 2026-03-13 | 2026 Speedo Sectionals (North) - West Fargovenue |
| 100 Butterfly | SCY | 55.59 | AAAA·Futures ✓+0.90s to Winter JNs | 2026-03-14 | 2026 Speedo Sectionals (North) - West Fargovenue |
| 50 Freestyle | LCM | 27.36 | AAA+0.07s to AAAA·Futures ✓+0.47s to Winter JNs | 2024-06-02 | 2024 LSC Duel in the Poolvenue |
| 100 Freestyle | LCM | 59.30 | AAA+0.41s to AAAA·Sectionals ✓+0.01s to Futures | 2024-08-04 | 2024 Central Zone 14 & U Championship - NDvenue |
| 50 Backstroke | LCM | 30.06 | AAAA·Futures ✓+0.27s to Jr Nationals | 2025-07-25 | 2025 TYR FUTURES MADISONvenue |
| 100 Backstroke | LCM | 1:04.20 | AAAA·Jr Nationals ✓+0.91s to US Open | 2025-07-24 | 2025 TYR FUTURES MADISONvenue |
| 200 Backstroke | LCM | 2:27.03 | AAA+6.14s to AAAA·Sectionals ✓+3.04s to Futures | 2024-07-19 | 2024 IL Swimming LC Age Group Championshipsvenue |
| 50 Butterfly | LCM | 29.62 | AAA+0.23s to AAAA·Sectionals ✓+0.13s to Futures | 2024-08-03 | 2024 Central Zone 14 & U Championship - NDvenue |
| 100 Butterfly | LCM | 1:04.63 | AAA+1.34s to AAAA·Futures ✓+1.94s to Winter JNs | 2026-08-05 | 2026 Speedo Junior National Championshipsvenue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 16.
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 | 23.67 | flat | 200 Free Relay | 2026-03-13 | 2026 Speedo Sectionals (North) - West Fargo |
| 50 Freestyle | SCY | 23.17 | flying | 200 Free Relay (leg 4) | 2025-12-12 | 2025 West Speedo Winter Juniors |
| 100 Freestyle | SCY | 50.72 | flying | 400 Free Relay (leg 3) | 2026-03-14 | 2026 Speedo Sectionals (North) - West Fargo |
| 200 Freestyle | SCY | 1:54.62 | flying | 800 Free Relay (leg 4) | 2026-03-12 | 2026 Speedo Sectionals (North) - West Fargo |
| 50 Backstroke | SCY | 26.30 | flat | 200 Medley Relay | 2026-03-12 | 2026 Speedo Sectionals (North) - West Fargo |
| 100 Backstroke | SCY | 55.48 | flat | 400 Medley Relay | 2025-12-11 | 2025 West Speedo Winter Juniors |
| 100 Butterfly | SCY | 54.72 | flying | 400 Medley Relay (leg 3) | 2026-03-15 | 2026 Speedo Sectionals (North) - West Fargo |
| 50 Freestyle | LCM | 26.70 | flying | 200 Free Relay (leg 2) | 2025-07-30 | 2025 Speedo Junior National Championships |
| 50 Freestyle | LCM | 26.82 | flying | 200 Medley Relay (leg 4) | 2026-07-09 | 2026 CENTRAL ZONE NORTH SUMMER CHAMPIONSHIPS |
| 100 Freestyle | LCM | 58.57 | flying | 400 Free Relay (leg 4) | 2026-07-11 | 2026 CENTRAL ZONE NORTH SUMMER CHAMPIONSHIPS |
| 100 Freestyle | LCM | 59.71 | flying | 400 Medley Relay (leg 4) | 2025-07-26 | 2025 TYR FUTURES MADISON |
| 200 Freestyle | LCM | 2:19.09 | flat | 800 Free Relay | 2024-07-18 | 2024 IL Swimming LC Age Group Championships |
| 200 Freestyle | LCM | 2:15.00 | flying | 800 Free Relay (leg 4) | 2026-07-10 | 2026 CENTRAL ZONE NORTH SUMMER CHAMPIONSHIPS |
| 50 Backstroke | LCM | 29.85 | flat | 200 Medley Relay | 2025-07-23 | 2025 TYR FUTURES MADISON |
| 100 Backstroke | LCM | 1:05.45 | flat | 400 Medley Relay | 2024-08-03 | 2024 Central Zone 14 & U Championship - ND |
| 100 Butterfly | LCM | 1:04.33 | flying | 400 Medley Relay (leg 3) | 2026-08-07 | 2026 Speedo Junior National 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 15-16 · SCY
949 points (1/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 200 BK SCY | 2:03.81 | 949 |
| 500 FR SCY | — | 0 |
| 200 BR SCY | — | 0 |
| 200 FL SCY | — | 0 |
| 200 IM SCY | — | 0 |
| 400 IM SCY | — | 0 |
IMR 15-16 · SCY
2824 points (3/5 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 2:02.39 | 762 |
| 100 BK SCY | 55.14 | 1052 |
| 100 FL SCY | 55.59 | 1010 |
| 100 BR 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 Freestyle SCY 52.32
Front half 25.25s · back half 27.07s
200 Freestyle SCY 2:02.39
Front half 57.86s · back half 64.53s
100 Backstroke SCY 55.14 RT 0.57s
Front half 26.80s · back half 28.34s
200 Backstroke SCY 2:03.81 RT 0.62s
Front half 58.98s · back half 64.83s
100 Butterfly SCY 55.59
Front half 26.32s · back half 29.27s
100 Freestyle LCM 59.30
Front half 28.67s · back half 30.63s
100 Backstroke LCM 1:04.20
Front half 31.25s · back half 32.95s
200 Backstroke LCM 2:27.03
Front half 72.16s · back half 74.87s
100 Butterfly LCM 1:04.63 RT 0.72s
Front half 30.10s · back half 34.53s
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.