swimHarper Posthumus
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 31.95 | BB+1.46s to A·+6.66s to Sectionals | 2026-07-14 | 2026 WMSL Summer "A" Championshipfast pool |
| 100 Freestyle | SCY | 1:12.63 | B+0.44s to BB·+18.14s to Sectionals | 2026-03-07 | 2026 Lake Michigan Regional Meetvenue |
| 200 Freestyle | SCY | 2:32.03 | BB+7.04s to A·+34.14s to Sectionals | 2026-07-14 | 2026 WMSL Summer "A" Championshipfast pool |
| 500 Freestyle | SCY | 7:02.96 | B+1.37s to BB·+107.97s to Sectionals | 2026-03-08 | 2026 Lake Michigan Regional Meetvenue |
| 50 Backstroke | SCY | 41.59 | +1.00s to B·+14.30s to Sectionals | 2026-02-07 | 2026 Grand Rapids Openvenue |
| 100 Backstroke | SCY | 1:32.75 | +2.06s to B·+32.26s to Sectionals | 2025-11-16 | 2025 GR Gales of November Open Invitationalvenue |
| 50 Breaststroke | SCY | 47.77 | +2.28s to B·+17.08s to Sectionals | 2025-12-06 | EGRA 2025 Winter Washoutvenue |
| 100 Breaststroke | SCY | 1:39.34 | B+6.45s to BB·+29.85s to Sectionals | 2026-02-07 | 2026 Grand Rapids Openvenue |
| 50 Butterfly | SCY | 45.05 | +6.16s to B·+18.36s to Sectionals | 2025-10-19 | 2025 WMS Boo Bashslow pool |
| 100 Individual Medley | SCY | 1:44.74 | +16.05s to B | 2024-11-02 | Greater Kalamazoo Arena Challengevenue |
| 200 Individual Medley | SCY | 3:14.35 | +1.56s to B·+61.36s to Sectionals | 2025-11-16 | 2025 GR Gales of November Open Invitationalvenue |
| 50 Freestyle | SCM | 49.26 | +10.17s to B | 2024-05-11 | 2024 WMS Spring Splashslow pool |
| 100 Freestyle | SCM | 1:33.79 | +7.90s to B | 2025-05-10 | 2025 WMS Spring Splashslow pool |
| 50 Backstroke | SCM | 56.50 | +11.61s to B | 2024-05-11 | 2024 WMS Spring Splashslow pool |
| 50 Breaststroke | SCM | 1:01.92 | +11.63s to B | 2024-05-11 | 2024 WMS Spring Splashslow pool |
| 50 Butterfly | SCM | 57.84 | +14.85s to B | 2025-05-10 | 2025 WMS Spring Splashslow pool |
| 100 Individual Medley | SCM | 1:53.23 | +15.24s to B | 2025-05-10 | 2025 WMS Spring Splashslow pool |
| 50 Freestyle | LCM | 35.87 | BB+1.08s to A·+7.08s to Sectionals | 2026-05-02 | 2026 Calvin Early Bird Invite LCMvenue |
| 100 Freestyle | LCM | 1:21.38 | BB+4.89s to A·+19.59s to Sectionals | 2026-06-28 | 2026 JAWS Sun & Fun ABC Spectacular & IMXvenue |
| 200 Freestyle | LCM | 2:59.44 | B+0.25s to BB·+46.35s to Sectionals | 2026-05-02 | 2026 Calvin Early Bird Invite LCMvenue |
| 50 Backstroke | LCM | 47.13 | +0.34s to B·+15.64s to Sectionals | 2026-06-28 | 2026 JAWS Sun & Fun ABC Spectacular & IMXvenue |
| 100 Backstroke | LCM | 1:41.27 | B+3.78s to BB·+30.78s to Sectionals | 2026-05-02 | 2026 Calvin Early Bird Invite LCMvenue |
| 50 Breaststroke | LCM | 51.74 | B+3.15s to BB·+16.15s to Sectionals | 2026-05-02 | 2026 Calvin Early Bird Invite LCMvenue |
| 50 Butterfly | LCM | 51.98 | +8.39s to B·+21.69s to Sectionals | 2026-06-27 | 2026 JAWS Sun & Fun ABC Spectacular & IMXvenue |
Cuts are USA Swimming single-age motivational standards (B → AAAA) at age 11.
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 | 34.61 | flying | 200 Medley Relay (leg 4) | 2025-11-16 | 2025 GR Gales of November Open Invitational |
| 50 Freestyle | SCY | 29.48 | flying | 200 Free Relay (leg 4) | 2025-10-19 | 2025 WMS Boo Bash |
| 50 Freestyle | SCM | 39.40 | flying | 200 Medley Relay (leg 4) | 2025-05-10 | 2025 WMS Spring Splash |
| 50 Freestyle | LCM | 38.57 | flying | 200 Free Relay (leg 3) | 2025-05-03 | 2025 Calvin Early Bird Invite LCM |
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
1644 points (5/5 events)
| Event | Time | Points |
|---|---|---|
| 200 FR SCY | 2:32.03 | 515 |
| 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
100 Freestyle SCY 1:12.63
Front half 33.34s · back half 39.29s
200 Freestyle SCY 2:32.03
Front half 71.93s · back half 80.10s
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.
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.