swimMarcus Seifert
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | LCM | 24.00 | Sectionals ✓+0.21s to Futures | 2026-07-09 | 2024 Speedo Grand Chalenge |
| 100 Freestyle | LCM | 54.50 | Sectionals ✓+2.51s to Futures | 2026-07-26 | 2026 IASI Long Course Championshipsfast pool |
| 200 Freestyle | LCM | 2:11.54 | +8.05s to Sectionals | 2026-06-19 | 2026 Waukee Waves Open Summer Invite |
| 50 Backstroke | LCM | 28.02 | Sectionals ✓+1.33s to Futures | 2026-07-26 | 2026 IASI Long Course Championshipsfast pool |
| 100 Backstroke | LCM | 1:01.99 | Sectionals ✓+3.80s to Futures | 2026-07-25 | 2026 IASI Long Course Championshipsfast pool |
| 50 Breaststroke | LCM | 34.98 | +2.99s to Sectionals | 2025-06-27 | 2025 CIA Beat the Heatvenue |
| 50 Butterfly | LCM | 24.77 | US Open ✓+0.38s to Nationals | 2026-07-24 | 2026 IASI Long Course Championshipsfast pool |
| 100 Butterfly | LCM | 1:20.13 | +18.64s to Sectionals | 2026-06-06 | 2026 Splash Out Hunger |
| 200 Individual Medley | LCM | 2:23.83 | +4.44s to Sectionals | 2026-06-19 | 2026 Waukee Waves Open Summer Invite |
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 | LCM | 24.24 | flat | 200 Free Relay | 2026-07-26 | 2026 IASI Long Course Championships |
| 100 Freestyle | LCM | 1:00.35 | flying | 400 Medley Relay (leg 4) | 2025-06-28 | 2025 CIA Beat the Heat |
| 100 Freestyle | LCM | 54.43 | flying | 400 Free Relay (leg 2) | 2026-07-23 | 2026 IASI Long Course Championships |
| 200 Freestyle | LCM | 2:06.21 | flying | 800 Free Relay (leg 4) | 2026-07-24 | 2026 IASI Long Course Championships |
| 50 Backstroke | LCM | 27.65 | flat | 200 Medley Relay | 2026-07-24 | 2026 IASI Long Course Championships |
| 100 Backstroke | LCM | 1:02.37 | flat | 400 Medley Relay | 2026-07-25 | 2026 IASI Long Course 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.
PR splits
100 Freestyle LCM 54.50
Front half 25.90s · back half 28.60s
200 Freestyle LCM 2:11.54 split/total mismatch
100 Backstroke LCM 1:01.99
Front half 29.15s · back half 32.84s
200 Individual Medley LCM 2:23.83 split/total mismatch
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.