swimJefferson Koscielny
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 25 Freestyle | SCY | 31.09 | 2020-02-08 | Southwest District 8 & Under Championships venue | |
| 50 Freestyle | SCY | 28.77 | B+1.08s to BB | 2025-12-04 | 14th Annual Swim & Tri Speedo Winter Champs |
| 100 Freestyle | SCY | 1:04.01 | B+3.62s to BB | 2026-02-27 | 2026 SW District Champs 9 & Over |
| 200 Freestyle | SCY | 2:25.45 | +2.86s to B | 2026-02-27 | 2026 SW District Champs 9 & Over |
| 500 Freestyle | SCY | 6:30.14 | +4.15s to B | 2025-11-23 | CA-Y November YMCA - copied venue |
| 25 Backstroke | SCY | 37.03 | 2020-01-05 | 2020 LY YMCA Winter Invitational slow pool | |
| 50 Backstroke | SCY | 38.43 | +4.74s to B | 2026-02-27 | 2026 SW District Champs 9 & Over |
| 100 Backstroke | SCY | 1:21.82 | +10.43s to B | 2026-01-31 | 2026 SwimRVA Heavyweight Battle |
| 200 Backstroke | SCY | 3:08.71 | +33.52s to B | 2026-01-02 | 2026 LY Winter Invitational |
| 25 Breaststroke | SCY | 38.41 | 2020-01-04 | 2020 LY YMCA Winter Invitational slow pool | |
| 50 Breaststroke | SCY | 47.91 | +9.32s to B | 2024-02-24 | SW District Champs 9 & Over venue |
| 100 Breaststroke | SCY | 1:34.27 | +13.68s to B | 2025-11-08 | CA-Y Tri Meet venue |
| 200 Breaststroke | SCY | 3:40.91 | +45.62s to B | 2024-02-25 | SW District Champs 9 & Over venue |
| 50 Butterfly | SCY | 31.25 | B+0.46s to BB | 2026-02-27 | 2026 SW District Champs 9 & Over |
| 100 Butterfly | SCY | 1:10.40 | B+4.91s to BB | 2026-02-27 | 2026 SW District Champs 9 & Over |
| 100 Individual Medley | SCY | 1:32.60 | 2024-01-27 | Cavalier Aquatics Dual vs Lynchburg Y venue | |
| 200 Individual Medley | SCY | 2:43.24 | +5.25s to B | 2025-09-19 | 2025 LY Season Opener venue |
| 400 Individual Medley | SCY | 5:49.19 | +11.50s to B | 2025-11-08 | CA-Y Tri Meet venue |
| 50 Freestyle | LCM | 31.92 | B+0.13s to BB | 2026-06-19 | 2026 Firefish June Jam |
| 100 Freestyle | LCM | 1:11.73 | B+1.94s to BB | 2026-05-02 | 2026 HOKI May Day Invite - copied venue |
| 200 Freestyle | LCM | 2:37.27 | B+4.98s to BB | 2026-06-19 | 2026 Firefish June Jam |
| 400 Freestyle | LCM | 5:53.41 | +3.52s to B | 2026-06-19 | 2026 Firefish June Jam |
| 50 Backstroke | LCM | 54.05 | +14.56s to B | 2024-07-13 | 2024 CCA Summer Awards venue |
| 100 Backstroke | LCM | 1:37.63 | +13.94s to B | 2026-06-05 | HNVR Storm Surge 2026 |
| 200 Backstroke | LCM | 4:16.24 | +74.25s to B | 2023-06-18 | 2023 Virginia Commonwealth Games venue |
| 50 Breaststroke | LCM | 45.96 | +1.87s to B | 2026-05-02 | 2026 HOKI May Day Invite - copied venue |
| 100 Breaststroke | LCM | 1:37.32 | +3.33s to B | 2026-06-19 | 2026 Firefish June Jam |
| 200 Breaststroke | LCM | 3:37.19 | +13.30s to B | 2026-06-05 | HNVR Storm Surge 2026 |
| 50 Butterfly | LCM | 34.31 | BB+2.32s to A | 2026-06-05 | HNVR Storm Surge 2026 |
| 100 Butterfly | LCM | 1:18.31 | B+3.72s to BB | 2026-06-19 | 2026 Firefish June Jam |
| 200 Individual Medley | LCM | 3:09.12 | +6.13s to B | 2026-05-03 | 2026 HOKI May Day Invite - copied 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 Butterfly | SCY | 31.67 | flying | 200 Medley Relay (leg 3) | 2026-01-31 | 2026 SwimRVA Heavyweight Battle |
| 50 Freestyle | LCM | 36.84 | flying | 200 Free Relay (leg 2) | 2024-07-12 | 2024 CCA Summer Awards |
| 50 Freestyle | LCM | 34.70 | flying | 200 Medley Relay (leg 4) | 2024-07-13 | 2024 CCA Summer Awards |
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 · SCY
1611 points (5/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 500 FR SCY | 6:30.14 | 407 |
| 200 BK SCY | 3:08.71 | 232 |
| 200 BR SCY | 3:40.91 | 209 |
| 200 IM SCY | 2:43.24 | 382 |
| 400 IM SCY | 5:49.19 | 381 |
| 200 FL SCY | — | 0 |
IMR 13-14 · LCM
1957 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR LCM | 2:37.27 | 478 |
| 100 BK LCM | 1:37.63 | 266 |
| 100 BR LCM | 1:37.32 | 376 |
| 100 FL LCM | 1:18.31 | 456 |
| 200 IM LCM | 3:09.12 | 381 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
500 Freestyle SCY 6:30.14
Front half 189.92s · back half 200.22s
100 Breaststroke SCY 1:34.27
Front half 43.60s · back half 50.67s
200 Breaststroke SCY 3:40.91
Front half 109.45s · back half 111.46s
100 Individual Medley SCY 1:32.60
Front half 46.38s · back half 46.22s
200 Individual Medley SCY 2:43.24
Front half 78.47s · back half 84.77s
400 Individual Medley SCY 5:49.19
Front half 170.97s · back half 178.22s
100 Freestyle LCM 1:11.73 RT 0.50s
Front half 34.57s · back half 37.16s
200 Backstroke LCM 4:16.24 RT 0.84s
Front half 123.94s · back half 132.30s
200 Individual Medley LCM 3:09.12
Front half 86.45s · back half 102.67s
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.