Harper Posthumus
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 32.36 | BB+1.87s to A | 2026-03-08 | 2026 Lake Michigan Regional Meet venue |
| 100 Freestyle | SCY | 1:06.41 | A+2.62s to AA | 2025-02-22 | 2025 Lake Michigan Regional Meet |
| 200 Freestyle | SCY | 2:42.70 | B+5.61s to BB | 2026-02-07 | 2026 Grand Rapids Open venue |
| 500 Freestyle | SCY | 7:02.96 | B+1.37s to BB | 2026-03-08 | 2026 Lake Michigan Regional Meet venue |
| 50 Backstroke | SCY | 41.59 | +1.00s to B | 2026-02-07 | 2026 Grand Rapids Open venue |
| 100 Backstroke | SCY | 1:32.75 | +2.06s to B | 2025-11-16 | 2025 GR Gales of November Open Invitational venue |
| 50 Breaststroke | SCY | 47.77 | +2.28s to B | 2025-12-06 | EGRA 2025 Winter Washout venue |
| 100 Breaststroke | SCY | 1:39.34 | B+6.45s to BB | 2026-02-07 | 2026 Grand Rapids Open venue |
| 50 Butterfly | SCY | 45.05 | +6.16s to B | 2025-10-19 | 2025 WMS Boo Bash venue |
| 100 Individual Medley | SCY | 1:44.74 | +16.05s to B | 2024-11-02 | Greater Kalamazoo Arena Challenge venue |
| 200 Individual Medley | SCY | 3:14.35 | +1.56s to B | 2025-11-16 | 2025 GR Gales of November Open Invitational venue |
| 50 Freestyle | SCM | 49.26 | +10.17s to B | 2024-05-11 | 2024 WMS Spring Splash venue |
| 100 Freestyle | SCM | 1:33.79 | +7.90s to B | 2025-05-10 | 2025 WMS Spring Splash venue |
| 50 Backstroke | SCM | 56.50 | +11.61s to B | 2024-05-11 | 2024 WMS Spring Splash venue |
| 50 Breaststroke | SCM | 1:01.92 | +11.63s to B | 2024-05-11 | 2024 WMS Spring Splash venue |
| 50 Butterfly | SCM | 57.84 | +14.85s to B | 2025-05-10 | 2025 WMS Spring Splash venue |
| 100 Individual Medley | SCM | 1:53.23 | +15.24s to B | 2025-05-10 | 2025 WMS Spring Splash venue |
| 50 Freestyle | LCM | 35.87 | BB+1.08s to A | 2026-05-02 | 2026 Calvin Early Bird Invite LCM venue |
| 100 Freestyle | LCM | 1:21.38 | BB+4.89s to A | 2026-06-28 | 2026 JAWS Sun & Fun ABC Spectacular & IMX venue |
| 200 Freestyle | LCM | 2:59.44 | B+0.25s to BB | 2026-05-02 | 2026 Calvin Early Bird Invite LCM venue |
| 50 Backstroke | LCM | 47.13 | +0.34s to B | 2026-06-28 | 2026 JAWS Sun & Fun ABC Spectacular & IMX venue |
| 100 Backstroke | LCM | 1:41.27 | B+3.78s to BB | 2026-05-02 | 2026 Calvin Early Bird Invite LCM venue |
| 50 Breaststroke | LCM | 51.74 | B+3.15s to BB | 2026-05-02 | 2026 Calvin Early Bird Invite LCM venue |
| 50 Butterfly | LCM | 51.36 | +7.77s to B | 2025-05-02 | 2025 Calvin Early Bird Invite LCM |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 11.
Fastest relay legs
| Leg | Course | Time | Start | Relay | Date | Meet |
|---|---|---|---|---|---|---|
| 50 Freestyle | SCY | 37.60 | flying | 200 Free Relay (leg 2) | 2025-01-11 | 2025 Zeeland Winter Classic |
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
1502 points (4/5 events — incomplete)
| Event | Time | Points |
|---|---|---|
| 500 FR SCY | 7:02.96 | 465 |
| 100 BK SCY | 1:32.75 | 308 |
| 100 BR SCY | 1:39.34 | 372 |
| 200 IM SCY | 3:14.35 | 357 |
| 100 FL SCY | — | 0 |
IMR 11-12 · SCY
1549 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 2:42.70 | 420 |
| 50 BK SCY | 41.59 | 342 |
| 50 BR SCY | 47.77 | 329 |
| 50 FL SCY | 45.05 | 232 |
| 100 IM SCY | 1:44.74 | 226 |
Scored against AAAA motivational base times: ordering is exact, absolute points run ~25% above the official USA Swimming scale.
PR splits
200 Freestyle SCY 2:42.70
Front half 79.83s · back half 82.87s
500 Freestyle SCY 7:02.96
Front half 208.60s · back half 214.36s
100 Backstroke SCY 1:32.75 RT 0.74s
Front half 46.45s · back half 46.30s
100 Breaststroke SCY 1:39.34
Front half 46.71s · back half 52.63s
100 Individual Medley SCY 1:44.74
Front half 51.20s · back half 53.54s
200 Individual Medley SCY 3:14.35
Front half 97.40s · back half 96.95s
100 Freestyle SCM 1:33.79
Front half 46.45s · back half 47.34s
100 Individual Medley SCM 1:53.23
Front half 57.93s · back half 55.30s
100 Freestyle LCM 1:21.38
Front half 37.92s · back half 43.46s
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.