swimNathaniel Rosen
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 23.67 | A+0.98s to AA | 2025-01-01 | NE Swimmimg 15-18 Age Group Championships |
| 100 Freestyle | SCY | 51.47 | A+1.58s to AA | 2025-01-01 | NE Swimmimg 15-18 Age Group Championships |
| 200 Freestyle | SCY | 1:50.98 | A+0.79s to AA | 2025-01-01 | NE Swimmimg 15-18 Age Group Championships |
| 500 Freestyle | SCY | 5:10.21 | A+10.52s to AA | 2025-01-03 | 2025 NE PHX Boston Winter Classic venue |
| 100 Backstroke | SCY | 59.53 | BB+3.34s to A | 2025-01-01 | NE Swimmimg 15-18 Age Group Championships |
| 50 Breaststroke | SCY | 34.84 | B+1.75s to BB | 2021-12-05 | 2021 ME LRSC Senior Meet venue |
| 100 Breaststroke | SCY | 1:11.77 | B+2.18s to BB | 2022-12-11 | 2022 ME BASA Bowdoin Open venue |
| 200 Breaststroke | SCY | 2:38.91 | B+7.62s to BB | 2022-12-10 | 2022 ME BASA Bowdoin Open venue |
| 50 Butterfly | SCY | 29.61 | B+0.92s to BB | 2020-12-11 | 2020 NE CL JCCS Dec.Intra-Squad Champs |
| 100 Butterfly | SCY | 1:03.24 | B+2.35s to BB | 2022-12-10 | 2022 ME BASA Bowdoin Open venue |
| 200 Butterfly | SCY | 2:21.99 | B+5.00s to BB | 2021-12-05 | 2021 ME LRSC Senior Meet venue |
| 100 Individual Medley | SCY | 1:07.92 | 2020-12-11 | 2020 NE CL JCCS Dec.Intra-Squad Champs | |
| 200 Individual Medley | SCY | 2:12.75 | BB+5.96s to A | 2024-11-16 | 2024 NE CRA November Distance & Specialty venue |
| 400 Individual Medley | SCY | 4:57.42 | B+1.03s to BB | 2021-03-19 | 2021 NE NSSC March 19-21 Specialty Meet |
| 50 Freestyle | LCM | 27.69 | BB+0.30s to A | 2024-06-23 | 2024 NE BGSC June Summer Solstice venue |
| 100 Freestyle | LCM | 1:01.57 | BB+1.38s to A | 2024-06-22 | 2024 NE BGSC June Summer Solstice venue |
| 200 Freestyle | LCM | 2:14.97 | BB+3.38s to A | 2024-06-23 | 2024 NE BGSC June Summer Solstice venue |
| 400 Freestyle | LCM | 5:12.05 | B+8.06s to BB | 2025-06-20 | 2025 NE CRA Team Specialty LC Meet venue |
| 50 Backstroke | LCM | 34.13 | BB+2.14s to A | 2025-07-25 | 2025 NE MST ESC Summer of '25 Team Specialty |
| 100 Backstroke | LCM | 1:13.69 | B+1.10s to BB | 2024-06-22 | 2024 NE BGSC June Summer Solstice venue |
| 200 Backstroke | LCM | 2:42.65 | B+4.56s to BB | 2024-06-02 | 2024 NE CRA MIT Team Specialty LC Meet venue |
| 100 Breaststroke | LCM | 1:25.57 | B+4.68s to BB | 2024-06-23 | 2024 NE BGSC June Summer Solstice venue |
| 200 Breaststroke | LCM | 3:10.08 | B+13.19s to BB | 2022-07-15 | 2022 ME SUMMER LCM CHAMPS venue |
| 100 Butterfly | LCM | 1:14.59 | B+4.90s to BB | 2022-07-15 | 2022 ME SUMMER LCM CHAMPS venue |
| 200 Individual Medley | LCM | 2:24.67 | A+2.78s to AA | 2025-01-01 | 2025 ne cs seacoast classic results |
| 400 Individual Medley | LCM | 4:42.74 | AAA+4.45s to AAAA | 2025-07-25 | 2025 NE MST ESC Summer of '25 Team Specialty |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 18.
Fastest relay legs
| Leg | Course | Time | Start | Relay | Date | Meet |
|---|---|---|---|---|---|---|
| 50 Freestyle | SCY | 23.50 | flat | 200 Free Relay | 2025-03-01 | 2025 NE CRIM 15-18 AG Championships |
| 50 Freestyle | SCY | 23.53 | flying | 200 Medley Relay (leg 4) | 2024-03-07 | 2024 NE CRIM 15-19 AG Championships |
| 100 Freestyle | SCY | 56.04 | flat | 400 Free Relay | 2022-12-11 | 2022 ME BASA Bowdoin Open |
| 100 Freestyle | SCY | 54.74 | flying | 400 Medley Relay (leg 4) | 2022-12-10 | 2022 ME BASA Bowdoin Open |
| 200 Freestyle | SCY | 2:04.03 | flat | 800 Free Relay | 2021-12-04 | 2021 ME LRSC Senior Meet |
| 200 Freestyle | SCY | 2:08.61 | flying | 800 Free Relay (leg 2) | 2019-12-13 | 2019 ME BASA Bowdoin Open |
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 · LCM
3007 points (5/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 400 FR LCM | 5:12.05 | 483 |
| 200 BK LCM | 2:42.65 | 474 |
| 200 BR LCM | 3:10.08 | 415 |
| 200 IM LCM | 2:24.67 | 708 |
| 400 IM LCM | 4:42.74 | 927 |
| 200 FL LCM | — | 0 |
IMR 17-18 · SCY
2807 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 1:50.98 | 735 |
| 100 BK SCY | 59.53 | 553 |
| 100 BR SCY | 1:11.77 | 474 |
| 100 FL SCY | 1:03.24 | 467 |
| 200 IM SCY | 2:12.75 | 578 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 51.47 split/total mismatch
Front half 24.65s · back half 26.82s
200 Freestyle SCY 1:50.98 split/total mismatch
Front half 28.19s · back half 82.79s
500 Freestyle SCY 5:10.21
Front half 151.00s · back half 159.21s
100 Backstroke SCY 59.53 split/total mismatch
Front half 28.36s · back half 31.17s
100 Breaststroke SCY 1:11.77
Front half 33.51s · back half 38.26s
200 Breaststroke SCY 2:38.91
Front half 74.87s · back half 84.04s
100 Butterfly SCY 1:03.24
Front half 29.65s · back half 33.59s
200 Butterfly SCY 2:21.99
Front half 66.58s · back half 75.41s
100 Individual Medley SCY 1:07.92 split/total mismatch
Front half 31.56s · back half 36.36s
200 Individual Medley SCY 2:12.75
Front half 63.58s · back half 69.17s
400 Individual Medley SCY 4:57.42 split/total mismatch
100 Freestyle LCM 1:01.57
Front half 29.54s · back half 32.03s
200 Freestyle LCM 2:14.97
Front half 65.00s · back half 69.97s
400 Freestyle LCM 5:12.05
Front half 148.97s · back half 163.08s
100 Backstroke LCM 1:13.69
Front half 35.27s · back half 38.42s
200 Backstroke LCM 2:42.65
Front half 78.55s · back half 84.10s
100 Breaststroke LCM 1:25.57
Front half 40.28s · back half 45.29s
200 Breaststroke LCM 3:10.08
Front half 90.02s · back half 100.06s
100 Butterfly LCM 1:14.59
Front half 34.69s · back half 39.90s
200 Individual Medley LCM 2:24.67 split/total mismatch
Front half 35.60s · back half 109.07s
400 Individual Medley LCM 4:42.74 split/total mismatch
Progression
Faster times are higher. One card per event, all courses & history.