swimMason Janusziewicz
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 25 Freestyle | SCY | 14.59 | 2024-05-04 | MAC May-hem Mini Meet | |
| 50 Freestyle | SCY | 28.02 | A+1.03s to AA | 2026-01-18 | 2026 Fox Winter Invitational Meet venue |
| 100 Freestyle | SCY | 1:00.05 | A+1.26s to AA | 2026-03-06 | 2026 MD LSC 14 & U Championships venue |
| 200 Freestyle | SCY | 2:03.86 | AA+1.27s to AAA | 2026-03-07 | 2026 MD LSC 14 & U Championships venue |
| 500 Freestyle | SCY | 5:38.01 | AA+8.02s to AAA | 2026-03-05 | 2026 MD LSC 14 & U Championships venue |
| 25 Backstroke | SCY | 23.33 | 2021-12-18 | 2021 Clippers' Fast & the Flurriest Meet slow pool | |
| 50 Backstroke | SCY | 31.11 | AA+1.42s to AAA | 2026-03-07 | 2026 MD LSC 14 & U Championships venue |
| 100 Backstroke | SCY | 1:04.95 | AA+2.16s to AAA | 2026-03-05 | 2025 Speedo MD LSC Senior Champs |
| 200 Backstroke | SCY | 2:19.14 | AA+3.25s to AAA | 2026-03-05 | 2025 Speedo MD LSC Senior Champs |
| 25 Breaststroke | SCY | 27.45 | 2022-03-26 | 2022 Maryland 8 & Under Championship Meet venue | |
| 50 Breaststroke | SCY | 37.67 | BB+0.98s to A | 2026-01-31 | 2026 ASC Senior Meet |
| 100 Breaststroke | SCY | 1:21.43 | BB+3.04s to A | 2026-01-18 | 2026 Fox Winter Invitational Meet venue |
| 25 Butterfly | SCY | 18.08 | 2024-05-04 | MAC May-hem Mini Meet | |
| 50 Butterfly | SCY | 33.78 | BB+2.59s to A | 2026-01-31 | 2026 ASC Senior Meet |
| 100 Butterfly | SCY | 1:14.73 | BB+5.44s to A | 2026-01-18 | 2026 Fox Winter Invitational Meet venue |
| 100 Individual Medley | SCY | 1:16.43 | B+0.54s to BB | 2025-12-04 | 14th Annual Swim & Tri Speedo Winter Champs |
| 200 Individual Medley | SCY | 2:59.47 | +0.18s to B | 2024-03-08 | 2024 Speedo Maryland Junior Championship - Si |
| 50 Freestyle | LCM | 31.38 | A+0.59s to AA | 2026-05-29 | 2026 FOX Speedo Summer Spectacular Meet venue |
| 100 Freestyle | LCM | 1:07.32 | AA+2.83s to AAA | 2026-05-29 | 2026 FOX Speedo Summer Spectacular Meet |
| 200 Freestyle | LCM | 2:28.62 | A+1.43s to AA | 2026-04-11 | 2026 Fox April Long Course Invitational |
| 400 Freestyle | LCM | 5:13.91 | A+0.82s to AA | 2026-05-29 | 2026 FOX Speedo Summer Spectacular Meet venue |
| 50 Backstroke | LCM | 36.35 | A+0.26s to AA | 2026-05-29 | 2026 FOX Speedo Summer Spectacular Meet |
| 100 Backstroke | LCM | 1:19.26 | A+1.17s to AA | 2026-04-11 | 2026 Fox April Long Course Invitational |
| 200 Backstroke | LCM | 2:40.92 | AA+1.43s to AAA | 2026-05-31 | 2026 FOX Speedo Summer Spectacular Meet venue |
| 50 Breaststroke | LCM | 51.32 | +1.53s to B | 2024-05-31 | 2024 FOX Speedo Summer Spectacular Meet |
| 100 Breaststroke | LCM | 2:06.26 | +18.47s to B | 2023-01-16 | 2023 Fox Winter Long Course Challenge venue |
| 50 Butterfly | LCM | 38.66 | BB+3.37s to A | 2025-05-31 | 2025 Fox Speedo Summer Spectacular venue |
| 100 Butterfly | LCM | 1:19.54 | BB+0.05s to A | 2026-04-11 | 2026 Fox April Long Course Invitational |
| 200 Individual Medley | LCM | 2:50.57 | A+4.08s to AA | 2026-05-29 | 2026 FOX Speedo Summer Spectacular Meet venue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 12.
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 | 27.64 | flat | 200 Free Relay | 2026-03-07 | 2026 MD LSC 14 & U Championships |
| 50 Freestyle | SCY | 30.10 | flying | 200 Free Relay (leg 2) | 2025-03-15 | 2025 Speedo Maryland Junior Championship - Si |
| 50 Freestyle | SCY | 27.41 | flying | 200 Medley Relay (leg 4) | 2026-03-05 | 2026 MD LSC 14 & U Championships |
| 100 Freestyle | SCY | 56.94 | flat | 400 Free Relay | 2026-03-08 | 2026 MD LSC 14 & U Championships |
| 100 Freestyle | SCY | 1:10.41 | flying | 400 Free Relay (leg 4) | 2024-03-03 | 2024 MD LSC 14 & U Championships |
| 100 Freestyle | SCY | 59.47 | flying | 400 Medley Relay (leg 4) | 2026-03-06 | 2026 MD LSC 14 & U Championships |
| 50 Freestyle | LCM | 34.06 | flying | 200 Medley Relay (leg 4) | 2024-08-02 | 2024 MD LSC LC Championships |
| 50 Freestyle | LCM | 34.80 | flying | 200 Free Relay (leg 3) | 2024-08-01 | 2024 MD LSC LC Championships |
| 100 Freestyle | LCM | 1:11.14 | flying | 400 Free Relay (leg 3) | 2025-07-31 | 2025 MD LSC LC 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 11-12 · SCY
3045 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 500 FR SCY | 5:38.01 | 809 |
| 100 BK SCY | 1:04.95 | 768 |
| 100 BR SCY | 1:21.43 | 576 |
| 100 FL SCY | 1:14.73 | 494 |
| 200 IM SCY | 2:59.47 | 398 |
IMR 11-12 · SCY
3173 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 2:03.86 | 842 |
| 50 BK SCY | 31.11 | 744 |
| 50 BR SCY | 37.67 | 584 |
| 50 FL SCY | 33.78 | 493 |
| 100 IM SCY | 1:16.43 | 510 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 1:00.05
Front half 28.88s · back half 31.17s
200 Freestyle SCY 2:03.86
Front half 60.08s · back half 63.78s
500 Freestyle SCY 5:38.01
Front half 164.83s · back half 173.18s
100 Breaststroke SCY 1:21.43
Front half 38.05s · back half 43.38s
100 Butterfly SCY 1:14.73
Front half 34.13s · back half 40.60s
400 Freestyle LCM 5:13.91
Front half 154.96s · back half 158.95s
200 Backstroke LCM 2:40.92
Front half 78.03s · back half 82.89s
100 Breaststroke LCM 2:06.26
Front half 61.89s · back half 64.37s
200 Individual Medley LCM 2:50.57
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.