swimZack Petersen
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 22.51 | AA+0.12s to AAA | 2025-07-20 | 2025 ISI Summer ACAD Regional venue |
| 100 Freestyle | SCY | 50.52 | AA+1.53s to AAA | 2024-03-09 | 2024 IL Swimming SC Age Group Championships slow pool |
| 200 Freestyle | SCY | 1:49.59 | AA+2.50s to AAA | 2024-03-08 | 2024 IL Swimming SC Age Group Championships slow pool |
| 500 Freestyle | SCY | 4:43.61 | AAA+5.82s to AAAA | 2026-03-07 | 2026 SC Illinois Senior Championships - copi venue |
| 1000 Freestyle | SCY | 9:55.09 | AAA+16.20s to AAAA | 2025-03-06 | 2025 SC Illinois Senior Championships venue |
| 1650 Freestyle | SCY | 17:27.91 | AA+37.02s to AAA | 2025-03-09 | 2025 SC Illinois Senior Championships venue |
| 50 Backstroke | SCY | 25.78 | AA+0.79s to AAA | 2025-03-07 | 2025 SC Illinois Senior Championships venue |
| 100 Backstroke | SCY | 52.94 | AAA+2.15s to AAAA | 2025-03-08 | 2025 SC Illinois Senior Championships venue |
| 200 Backstroke | SCY | 2:01.78 | AA+5.09s to AAA | 2024-06-15 | 2024 CZ Multi-Cultural Meet slow pool |
| 100 Breaststroke | SCY | 1:06.09 | BB+0.10s to A | 2024-06-16 | 2024 CZ Multi-Cultural Meet slow pool |
| 100 Butterfly | SCY | 58.73 | BB+1.04s to A | 2024-06-15 | 2024 CZ Multi-Cultural Meet slow pool |
| 200 Butterfly | SCY | 2:03.39 | AA+5.00s to AAA | 2025-07-20 | 2025 ISI Summer ACAD Regional venue |
| 200 Individual Medley | SCY | 2:00.08 | AA+1.19s to AAA | 2025-03-08 | 2025 SC Illinois Senior Championships venue |
| 50 Freestyle | LCM | 25.97 | AA+0.08s to AAA | 2025-08-02 | 2025 LC Illinois Senior Championships venue |
| 100 Freestyle | LCM | 56.61 | AA+0.12s to AAA | 2025-07-25 | 2025 NCSA Summer Swimming Championships |
| 200 Freestyle | LCM | 2:01.43 | AAA+3.44s to AAAA | 2025-06-19 | 2025 Synergy Dryland Summer Sizzler venue |
| 400 Freestyle | LCM | 4:28.13 | AA+4.44s to AAA | 2025-06-20 | 2025 Synergy Dryland Summer Sizzler venue |
| 800 Freestyle | LCM | 9:51.32 | A+20.03s to AA | 2024-06-01 | LFSC SwimFest LC 2024 slow pool |
| 1500 Freestyle | LCM | 18:18.57 | AA+46.98s to AAA | 2025-06-21 | 2025 Synergy Dryland Summer Sizzler venue |
| 100 Backstroke | LCM | 1:02.33 | AAA+2.74s to AAAA | 2025-06-20 | 2025 Synergy Dryland Summer Sizzler venue |
| 200 Backstroke | LCM | 2:18.45 | AA+3.06s to AAA | 2025-06-21 | 2025 Synergy Dryland Summer Sizzler venue |
| 100 Breaststroke | LCM | 1:21.45 | BB+4.46s to A | 2024-05-11 | Blue Devil Swim Club May Mania venue |
| 100 Butterfly | LCM | 1:08.39 | BB+2.40s to A | 2024-05-12 | Blue Devil Swim Club May Mania venue |
| 200 Individual Medley | LCM | 2:21.60 | AA+2.91s to AAA | 2025-08-02 | 2025 LC Illinois Senior Championships venue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 16.
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 | 22.20 | flat | 200 Free Relay | 2025-07-20 | 2025 ISI Summer ACAD Regional |
| 100 Freestyle | SCY | 51.24 | flying | 400 Free Relay (leg 4) | 2024-03-10 | 2024 IL Swimming SC Age Group Championships |
| 200 Freestyle | SCY | 1:50.75 | flying | 800 Free Relay (leg 4) | 2024-03-08 | 2024 IL Swimming SC Age Group Championships |
| 100 Backstroke | SCY | 48.76 | flat | 400 Medley Relay | 2025-03-08 | 2025 SC Illinois Senior Championships |
| 50 Freestyle | LCM | 24.98 | flying | 200 Free Relay (leg 4) | 2025-08-02 | 2025 LC Illinois Senior 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
3272 points (4/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 500 FR SCY | 4:43.61 | 924 |
| 200 BK SCY | 2:01.78 | 750 |
| 200 FL SCY | 2:03.39 | 761 |
| 200 IM SCY | 2:00.08 | 837 |
| 200 BR SCY | — | 0 |
| 400 IM SCY | — | 0 |
IMR 15-16 · SCY
3816 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 1:49.59 | 806 |
| 100 BK SCY | 52.94 | 877 |
| 100 BR SCY | 1:06.09 | 665 |
| 100 FL SCY | 58.73 | 631 |
| 200 IM SCY | 2:00.08 | 837 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 50.52
Front half 24.09s · back half 26.43s
200 Freestyle SCY 1:49.59
Front half 52.41s · back half 57.18s
500 Freestyle SCY 4:43.61
Front half 136.99s · back half 146.62s
1000 Freestyle SCY 9:55.09
Front half 287.79s · back half 307.30s
1650 Freestyle SCY 17:27.91
100 Backstroke SCY 52.94
Front half 25.77s · back half 27.17s
200 Backstroke SCY 2:01.78
Front half 59.76s · back half 62.02s
100 Breaststroke SCY 1:06.09
Front half 30.90s · back half 35.19s
100 Butterfly SCY 58.73
Front half 27.49s · back half 31.24s
200 Butterfly SCY 2:03.39
Front half 56.53s · back half 66.86s
200 Individual Medley SCY 2:00.08
Front half 55.38s · back half 64.70s
200 Freestyle LCM 2:01.43
Front half 58.62s · back half 62.81s
400 Freestyle LCM 4:28.13
Front half 125.98s · back half 142.15s
800 Freestyle LCM 9:51.32
Front half 297.56s · back half 293.76s
1500 Freestyle LCM 18:18.57
200 Backstroke LCM 2:18.45
Front half 65.09s · back half 73.36s
200 Individual Medley LCM 2:21.60 RT 0.64s
Front half 64.78s · back half 76.82s
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.