swimJohn Brostowitz
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 22.24 | AA+0.55s to AAA | 2024-11-17 | 2024 Schroeder YMCA Invite venue |
| 100 Freestyle | SCY | 48.55 | AA+0.86s to AAA | 2024-10-13 | 2024 Greater Milwaukee Open venue |
| 200 Freestyle | SCY | 1:45.46 | AA+0.07s to AAA | 2024-10-11 | 2024 Greater Milwaukee Open venue |
| 50 Backstroke | SCY | 24.18 | AAA+0.99s to AAAA | 2024-11-23 | 2024 Fall Western Great Lakes Open venue |
| 200 Backstroke | SCY | 1:54.44 | AA+0.95s to AAA | 2024-11-24 | 2024 Fall Western Great Lakes Open venue |
| 50 Breaststroke | SCY | 26.37 | AAAA | 2024-11-22 | 2024 Fall Western Great Lakes Open venue |
| 100 Breaststroke | SCY | 56.37 | AAA+0.18s to AAAA | 2026-04-03 | 2026 YMCA Short Course Nationals fast pool |
| 200 Breaststroke | SCY | 2:01.18 | AAAA | 2026-03-31 | 2026 YMCA Short Course Nationals fast pool |
| 50 Butterfly | SCY | 23.07 | AAAA | 2024-11-22 | 2024 Fall Western Great Lakes Open venue |
| 100 Butterfly | SCY | 52.04 | AA+0.45s to AAA | 2024-11-23 | 2024 Fall Western Great Lakes Open venue |
| 200 Butterfly | SCY | 1:59.91 | AA+4.02s to AAA | 2024-10-12 | 2024 Greater Milwaukee Open venue |
| 200 Individual Medley | SCY | 1:52.00 | AAA+1.11s to AAAA | 2026-04-02 | 2026 YMCA Short Course Nationals fast pool |
| 400 Individual Medley | SCY | 4:02.45 | AAA+3.06s to AAAA | 2026-04-01 | 2026 YMCA Short Course Nationals fast pool |
| 50 Freestyle | LCM | 25.09 | AAA+1.10s to AAAA | 2024-07-14 | 2024 CZ North Section Summer Sectionals venue |
| 100 Freestyle | LCM | 56.25 | AA+1.06s to AAA | 2024-06-09 | Shorewood 2024 Long Course Summer Open venue |
| 200 Freestyle | LCM | 2:05.44 | AA+4.75s to AAA | 2024-05-04 | 15th Annual Early Bird venue |
| 50 Backstroke | LCM | 32.96 | BB+0.97s to A | 2019-08-04 | 2019 WI Central Zone 14 & U Championship slow pool |
| 100 Backstroke | LCM | 1:01.66 | AA+0.27s to AAA | 2024-07-12 | 2024 CZ North Section Summer Sectionals venue |
| 200 Backstroke | LCM | 2:18.92 | AA+5.13s to AAA | 2024-06-01 | 9th Annual Pirate Plunge venue |
| 100 Breaststroke | LCM | 1:09.20 | AA+0.81s to AAA | 2025-05-18 | 2025 Distance-Sprint Meet venue |
| 200 Breaststroke | LCM | 2:27.02 | AAA+4.13s to AAAA | 2024-07-11 | 2024 CZ North Section Summer Sectionals venue |
| 50 Butterfly | LCM | 32.42 | B+0.13s to BB | 2019-08-01 | 2019 WI Central Zone 14 & U Championship slow pool |
| 100 Butterfly | LCM | 57.23 | AAA+0.94s to AAAA | 2024-07-13 | 2024 CZ North Section Summer Sectionals venue |
| 200 Individual Medley | LCM | 2:12.86 | AAA+3.27s to AAAA | 2024-07-14 | 2024 CZ North Section Summer Sectionals venue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 18.
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 | 20.84 | flying | 200 Free Relay (leg 3) | 2026-04-01 | 2026 YMCA Short Course Nationals |
| 100 Freestyle | SCY | 46.00 | flying | 400 Free Relay (leg 3) | 2026-04-03 | 2026 YMCA Short Course Nationals |
| 100 Freestyle | SCY | 45.76 | flying | 400 Medley Relay (leg 4) | 2026-04-02 | 2026 YMCA Short Course Nationals |
| 200 Freestyle | SCY | 1:41.13 | flying | 800 Free Relay (leg 3) | 2026-03-30 | 2026 YMCA Short Course Nationals |
| 50 Breaststroke | SCY | 25.36 | flying | 200 Medley Relay (leg 2) | 2026-03-31 | 2026 YMCA Short Course Nationals |
| 100 Breaststroke | LCM | 1:07.84 | flying | 400 Medley Relay (leg 2) | 2024-07-14 | 2024 CZ North Section Summer Sectionals |
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 17-18 · SCY
4523 points (5/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 200 BK SCY | 1:54.44 | 837 |
| 200 BR SCY | 2:01.18 | 1012 |
| 200 FL SCY | 1:59.91 | 767 |
| 200 IM SCY | 1:52.00 | 962 |
| 400 IM SCY | 4:02.45 | 945 |
| 500 FR SCY | — | 0 |
IMR 17-18 · LCM
4287 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR LCM | 2:05.44 | 764 |
| 100 BK LCM | 1:01.66 | 840 |
| 100 BR LCM | 1:09.20 | 832 |
| 100 FL LCM | 57.23 | 936 |
| 200 IM LCM | 2:12.86 | 915 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 48.55
Front half 23.26s · back half 25.29s
200 Freestyle SCY 1:45.46
Front half 50.16s · back half 55.30s
200 Backstroke SCY 1:54.44
Front half 56.13s · back half 58.31s
100 Breaststroke SCY 56.37 RT 0.70s
Front half 26.65s · back half 29.72s
200 Breaststroke SCY 2:01.18 RT 0.69s
Front half 57.40s · back half 63.78s
100 Butterfly SCY 52.04
Front half 24.72s · back half 27.32s
200 Butterfly SCY 1:59.91
Front half 55.23s · back half 64.68s
200 Individual Medley SCY 1:52.00 RT 0.69s
Front half 52.75s · back half 59.25s
400 Individual Medley SCY 4:02.45 RT 0.69s
Front half 115.28s · back half 127.17s
100 Freestyle LCM 56.25
Front half 26.72s · back half 29.53s
200 Freestyle LCM 2:05.44
Front half 59.68s · back half 65.76s
100 Backstroke LCM 1:01.66 RT 0.66s
Front half 29.40s · back half 32.26s
200 Backstroke LCM 2:18.92
Front half 66.77s · back half 72.15s
100 Breaststroke LCM 1:09.20
Front half 32.75s · back half 36.45s
200 Breaststroke LCM 2:27.02 RT 0.66s
Front half 69.74s · back half 77.28s
100 Butterfly LCM 57.23 RT 0.66s
Front half 26.33s · back half 30.90s
200 Individual Medley LCM 2:12.86 RT 0.65s
Front half 61.65s · back half 71.21s
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.