swimMackenzie Desrosiers
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 29.19 | BB+1.50s to A·+4.40s to Sectionals | 2025-10-11 | 2025 WAC Start Up Classic |
| 100 Freestyle | SCY | 1:04.30 | BB+4.21s to A·+11.21s to Sectionals | 2025-10-11 | 2025 WAC Start Up Classic |
| 200 Freestyle | SCY | 2:33.85 | +2.46s to B·+38.86s to Sectionals | 2022-01-23 | Live M.A.S Invitationalslow pool |
| 500 Freestyle | SCY | 7:59.43 | +71.24s to B·+170.64s to Sectionals | 2022-01-22 | Live M.A.S Invitationalslow pool |
| 50 Backstroke | SCY | 38.07 | +2.18s to B·+11.78s to Futures | 2021-11-14 | 2021 VA WAC Fall Classicvenue |
| 100 Backstroke | SCY | 1:24.43 | +8.54s to B·+25.14s to Sectionals | 2021-10-23 | Clippers' Raising the Anchor Meetslow pool |
| 50 Breaststroke | SCY | 38.22 | BB+2.33s to A·+8.43s to Futures | 2022-02-12 | 2022 CAC Spring Fest Invitiationalvenue |
| 100 Breaststroke | SCY | 1:27.77 | +0.28s to B·+19.58s to Sectionals | 2022-03-12 | 2022 MD LSC JR CHAMPS - FSC SITEvenue |
| 200 Breaststroke | SCY | 3:10.20 | +2.01s to B·+40.81s to Sectionals | 2022-02-12 | 2022 CAC Spring Fest Invitiationalvenue |
| 50 Butterfly | SCY | 33.77 | B+0.98s to BB·+8.08s to Futures | 2025-10-11 | 2025 WAC Start Up Classic |
| 100 Individual Medley | SCY | 1:17.98 | 2022-03-13 | 2022 MD LSC JR CHAMPS - FSC SITEvenue | |
| 200 Individual Medley | SCY | 2:50.70 | +1.81s to B·+40.01s to Sectionals | 2022-01-22 | Live M.A.S Invitationalslow pool |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 15.
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 | 30.47 | flat | 200 Free Relay | 2021-10-30 | 2021 NBAC Fall Fastival Meet |
| 50 Freestyle | SCY | 28.46 | flying | 200 Free Relay (leg 3) | 2022-02-12 | 2022 CAC Spring Fest Invitiational |
| 50 Breaststroke | SCY | 38.84 | flying | 200 Medley Relay (leg 2) | 2022-02-13 | 2022 CAC Spring Fest Invitiational |
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
1028 points (3/6 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 500 FR SCY | 7:59.43 | 246 |
| 200 BR SCY | 3:10.20 | 394 |
| 200 IM SCY | 2:50.70 | 388 |
| 200 BK SCY | — | 0 |
| 200 FL SCY | — | 0 |
| 400 IM SCY | — | 0 |
IMR 15-16 · SCY
1460 points (4/5 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 2:33.85 | 383 |
| 100 BK SCY | 1:24.43 | 293 |
| 100 BR SCY | 1:27.77 | 396 |
| 200 IM SCY | 2:50.70 | 388 |
| 100 FL SCY | — | 0 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
200 Freestyle SCY 2:33.85
Front half 74.70s · back half 79.15s
500 Freestyle SCY 7:59.43
Front half 201.43s · back half 278.00s
100 Breaststroke SCY 1:27.77
Front half 41.17s · back half 46.60s
200 Breaststroke SCY 3:10.20
Front half 91.13s · back half 99.07s
100 Individual Medley SCY 1:17.98
Front half 37.18s · back half 40.80s
200 Individual Medley SCY 2:50.70
Front half 82.75s · back half 87.95s
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.