swimDavid Mazurek
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 21.85 | AAA+0.46s to AAAA·Sectionals ✓+0.56s to Futures | 2026-03-07 | 2026 SC Illinois Senior Championships - copi venue |
| 100 Freestyle | SCY | 47.63 | AAA+0.84s to AAAA·Sectionals ✓+1.24s to Futures | 2026-03-08 | 2026 SC Illinois Senior Championships - copi venue |
| 200 Freestyle | SCY | 1:48.17 | AA+1.08s to AAA·+0.68s to Sectionals | 2026-03-06 | 2026 SC Illinois Senior Championships - copi venue |
| 500 Freestyle | SCY | 5:09.26 | A+4.97s to AA·+16.37s to Sectionals | 2024-03-10 | 2024 IL Swimming SC Age Group Championships slow pool |
| 1000 Freestyle | SCY | 10:34.47 | A+0.48s to AA·+25.98s to Sectionals | 2024-03-09 | 2024 IL Swimming SC Age Group Championships slow pool |
| 1650 Freestyle | SCY | 17:42.60 | A+5.71s to AA·+37.61s to Sectionals | 2024-03-07 | 2024 IL Swimming SC Age Group Championships slow pool |
| 50 Freestyle | LCM | 26.07 | AA+0.18s to AAA·+0.08s to Sectionals | 2025-08-02 | 2025 LC Illinois Senior Championships venue |
| 400 Freestyle | LCM | 5:13.65 | B+2.06s to BB·+51.46s to Sectionals | 2024-04-21 | 2024 April Long Course Open slow pool |
| 800 Freestyle | LCM | 9:27.06 | AA+20.57s to AAA·+16.27s to Sectionals | 2025-07-31 | 2025 LC Illinois Senior Championships venue |
| 1500 Freestyle | LCM | 18:34.96 | A+15.57s to AA·+54.97s to Sectionals | 2025-08-03 | 2025 LC Illinois Senior Championships venue |
| 100 Backstroke | LCM | 1:15.74 | B+1.95s to BB·+11.35s to Sectionals | 2024-04-21 | 2024 April Long Course Open slow pool |
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 | 20.57 | flying | 200 Medley Relay (leg 4) | 2026-03-08 | 2026 SC Illinois Senior Championships - copi |
| 100 Freestyle | SCY | 50.78 | flying | 400 Free Relay (leg 3) | 2024-03-10 | 2024 IL Swimming SC Age Group 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
713 points (1/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 500 FR SCY | 5:09.26 | 713 |
| 200 BK SCY | — | 0 |
| 200 BR SCY | — | 0 |
| 200 FL SCY | — | 0 |
| 200 IM SCY | — | 0 |
| 400 IM SCY | — | 0 |
IMR 15-16 · SCY
838 points (1/5 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 1:48.17 | 838 |
| 100 BK SCY | — | 0 |
| 100 BR SCY | — | 0 |
| 100 FL 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 47.63
Front half 23.03s · back half 24.60s
200 Freestyle SCY 1:48.17
Front half 50.88s · back half 57.29s
500 Freestyle SCY 5:09.26
Front half 149.96s · back half 159.30s
1000 Freestyle SCY 10:34.47
Front half 315.30s · back half 319.17s
1650 Freestyle SCY 17:42.60
400 Freestyle LCM 5:13.65
Front half 155.43s · back half 158.22s
800 Freestyle LCM 9:27.06 RT 0.74s
1500 Freestyle LCM 18:34.96 RT 0.72s
Front half 553.12s · back half 561.84s
100 Backstroke LCM 1:15.74
Front half 36.71s · back half 39.03s
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.