swimJefferson Koller
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 30.26 | B+1.37s to BB·+7.67s to Sectionals | 2026-02-22 | 2026 MN FOXJ MN Bronze Championshipvenue |
| 100 Freestyle | SCY | 52.25 | AAA+1.56s to AAAA·+3.26s to Sectionals | 2025-01-25 | 2025 MN HAST JAN IMX |
| 200 Freestyle | SCY | 2:24.54 | B+7.35s to BB·+37.05s to Sectionals | 2026-02-21 | 2026 MN FOXJ MN Bronze Championshipvenue |
| 50 Backstroke | SCY | 34.79 | B+1.90s to BB·+10.30s to Sectionals | 2026-02-27 | 2026 MN RSC Minnesota Regional Championship -fast pool |
| 100 Backstroke | SCY | 1:19.47 | +5.08s to B·+23.38s to Sectionals | 2026-02-14 | 2026 MN STRM Winter Storm Warning Invitevenue |
| 50 Breaststroke | SCY | 51.89 | +11.40s to B·+24.70s to Sectionals | 2025-05-10 | 2025 MN SHRK Tigersharks IM Tough Challenagevenue |
| 100 Breaststroke | SCY | 1:55.05 | +30.76s to B·+51.46s to Sectionals | 2025-03-07 | 2025 MN STRM Minnesota Regional Championshipfast pool |
| 50 Butterfly | SCY | 38.24 | +3.55s to B·+14.55s to Sectionals | 2026-02-21 | 2026 MN FOXJ MN Bronze Championshipvenue |
| 100 Butterfly | SCY | 1:51.07 | +37.28s to B·+57.08s to Sectionals | 2025-02-08 | 2025 MN NOR Championship Belt Sprint Spectacuvenue |
| 100 Individual Medley | SCY | 1:35.46 | 2025-03-08 | 2025 MN STRM Minnesota Regional Championshipfast pool | |
| 200 Individual Medley | SCY | 3:01.11 | +16.42s to B·+60.12s to Sectionals | 2025-11-15 | 2025 MN SHRK Tigersharks Thanksgiving Classicvenue |
| 50 Freestyle | LCM | 39.21 | +3.52s to B·+13.22s to Sectionals | 2025-05-17 | 2025 MN STRM Spring Startupvenue |
| 100 Freestyle | LCM | 1:29.09 | +10.90s to B·+32.50s to Sectionals | 2025-05-18 | 2025 MN STRM Spring Startupvenue |
| 200 Freestyle | LCM | 3:02.07 | +12.08s to B·+58.58s to Sectionals | 2025-06-20 | 2025 MN MAN Red White & Blue Invitevenue |
| 50 Backstroke | LCM | 46.52 | +5.33s to B·+17.83s to Sectionals | 2025-05-17 | 2025 MN STRM Spring Startupvenue |
| 100 Backstroke | LCM | 1:37.80 | +10.41s to B·+33.41s to Sectionals | 2025-06-08 | 2025 MN STRM Summer Slamvenue |
| 50 Breaststroke | LCM | 1:05.00 | +19.11s to B·+33.01s to Sectionals | 2025-06-08 | 2025 MN STRM Summer Slamvenue |
| 50 Butterfly | LCM | 53.83 | +14.84s to B·+26.44s to Sectionals | 2025-06-21 | 2025 MN MAN Red White & Blue Invitevenue |
| 200 Individual Medley | LCM | 3:50.61 | +40.22s to B·+91.22s to Sectionals | 2025-05-18 | 2025 MN STRM Spring Startupvenue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 13.
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 | 30.48 | flying | 200 Free Relay (leg 4) | 2026-03-01 | 2026 MN RSC Minnesota Regional Championship - |
| 50 Freestyle | SCY | 30.85 | flying | 200 Medley Relay (leg 4) | 2026-02-28 | 2026 MN RSC Minnesota Regional Championship - |
| 50 Breaststroke | SCY | 59.24 | flying | 200 Medley Relay (leg 2) | 2024-01-27 | 2024 MN Hast Jan IMX |
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
280 points (1/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 200 IM SCY | 3:01.11 | 280 |
| 500 FR SCY | — | 0 |
| 200 BK SCY | — | 0 |
| 200 BR SCY | — | 0 |
| 200 FL SCY | — | 0 |
| 400 IM SCY | — | 0 |
IMR 13-14 · SCY
1239 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 2:24.54 | 404 |
| 100 BK SCY | 1:19.47 | 304 |
| 100 BR SCY | 1:55.05 | 144 |
| 100 FL SCY | 1:51.07 | 107 |
| 200 IM SCY | 3:01.11 | 280 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 52.25
200 Freestyle SCY 2:24.54
Front half 70.52s · back half 74.02s
100 Backstroke SCY 1:19.47
Front half 38.90s · back half 40.57s
100 Breaststroke SCY 1:55.05
Front half 54.19s · back half 60.86s
100 Butterfly SCY 1:51.07
Front half 52.49s · back half 58.58s
100 Individual Medley SCY 1:35.46
Front half 42.62s · back half 52.84s
200 Individual Medley SCY 3:01.11
Front half 88.91s · back half 92.20s
100 Freestyle LCM 1:29.09
Front half 42.30s · back half 46.79s
200 Freestyle LCM 3:02.07
Front half 88.69s · back half 93.38s
100 Backstroke LCM 1:37.80
Front half 47.78s · back half 50.02s
200 Individual Medley LCM 3:50.61
Front half 110.11s · back half 120.50s
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.