swimMackenzie Marrero
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 28.04 | AA+1.05s to AAA·+3.25s to Sectionals | 2026-03-19 | 2026 NJS & Scarlet 11 & Over Gold Champs |
| 100 Freestyle | SCY | 1:01.24 | AA+2.55s to AAA·+8.15s to Sectionals | 2026-01-17 | ISCA January Classic 2026venue |
| 200 Freestyle | SCY | 2:16.83 | A+2.64s to AA·+21.84s to Sectionals | 2025-01-17 | 2025 MR NFS 42nd Annual Dr. MLK Jr. Invite |
| 500 Freestyle | SCY | 6:06.05 | A+6.86s to AA·+57.26s to Sectionals | 2026-01-18 | ISCA January Classic 2026venue |
| 50 Backstroke | SCY | 32.28 | A+0.39s to AA·+5.99s to Futures | 2026-03-19 | 2026 NJS & Scarlet 11 & Over Gold Champs |
| 100 Backstroke | SCY | 1:31.06 | +4.47s to B·+31.77s to Sectionals | 2024-01-16 | BHA Winter Blizzard |
| 200 Backstroke | SCY | 2:38.68 | BB+4.29s to A·+29.79s to Sectionals | 2026-01-18 | ISCA January Classic 2026venue |
| 50 Breaststroke | SCY | 34.98 | AA+0.39s to AAA·+5.19s to Futures | 2026-03-19 | 2026 NJS & Scarlet 11 & Over Gold Champs |
| 100 Breaststroke | SCY | 1:17.62 | AA+2.53s to AAA·+9.43s to Sectionals | 2026-01-17 | ISCA January Classic 2026venue |
| 200 Breaststroke | SCY | 2:56.95 | BB+0.46s to A·+27.56s to Sectionals | 2026-01-18 | ISCA January Classic 2026venue |
| 50 Butterfly | SCY | 31.26 | A+0.87s to AA·+5.57s to Futures | 2026-03-19 | 2026 NJS & Scarlet 11 & Over Gold Champs |
| 100 Individual Medley | SCY | 1:09.05 | AA+2.06s to AAA | 2026-03-19 | 2026 NJS & Scarlet 11 & Over Gold Champs |
| 200 Individual Medley | SCY | 2:30.82 | AA+6.23s to AAA·+20.13s to Sectionals | 2026-01-17 | ISCA January Classic 2026venue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 12.
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.
Fastest relay legs
| Leg | Course | Time | Start | Relay | Date | Meet |
|---|---|---|---|---|---|---|
| 50 Freestyle | SCY | 29.32 | flying | 200 Medley Relay (leg 4) | 2024-03-30 | 2024 Eastern Zone SC Age Group Championships |
| 50 Freestyle | SCY | 30.24 | flying | 200 Free Relay (leg 2) | 2024-03-28 | 2024 Eastern Zone SC Age Group Championships |
| 100 Freestyle | SCY | 1:07.90 | flying | 400 Free Relay (leg 2) | 2024-03-29 | 2024 Eastern Zone 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 11-12 · SCY
2588 points (4/5 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 500 FR SCY | 6:06.05 | 717 |
| 100 BK SCY | 1:31.06 | 326 |
| 100 BR SCY | 1:17.62 | 781 |
| 200 IM SCY | 2:30.82 | 764 |
| 100 FL SCY | — | 0 |
IMR 11-12 · SCY
3762 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 2:16.83 | 706 |
| 50 BK SCY | 32.28 | 731 |
| 50 BR SCY | 34.98 | 838 |
| 50 FL SCY | 31.26 | 695 |
| 100 IM SCY | 1:09.05 | 792 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
100 Freestyle SCY 1:01.24
Front half 29.48s · back half 31.76s
200 Freestyle SCY 2:16.83 split/total mismatch
Front half 80.51s · back half 56.32s
500 Freestyle SCY 6:06.05
Front half 180.94s · back half 185.11s
100 Backstroke SCY 1:31.06 split/total mismatch
Front half 42.87s · back half 48.19s
200 Backstroke SCY 2:38.68
Front half 78.32s · back half 80.36s
100 Breaststroke SCY 1:17.62
Front half 36.57s · back half 41.05s
200 Breaststroke SCY 2:56.95
Front half 83.70s · back half 93.25s
200 Individual Medley SCY 2:30.82
Front half 72.54s · back half 78.28s
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.