Sean Diffenderfer
Personal records
| Event | Course | Best | Cut | Date | Meet |
|---|---|---|---|---|---|
| 50 Freestyle | SCY | 22.05 | Sectionals ✓+2.36s to US Open | 2026-02-08 | 2026 Michigan Openvenue |
| 200 Freestyle | SCY | 1:41.08 | Sectionals ✓+6.09s to US Open | 2025-02-09 | 2025 Michigan Openvenue |
| 500 Freestyle | SCY | 4:30.70 | Sectionals ✓+10.81s to US Open | 2026-02-07 | 2026 Michigan Openvenue |
| 1650 Freestyle | SCY | 15:38.72 | Sectionals ✓+30.73s to US Open | 2026-02-06 | 2026 Michigan Openvenue |
| 200 Freestyle | LCM | 2:04.04 | +0.55s to Sectionals | 2021-07-16 | 2021 Speedo Sectional Meetvenue |
| 400 Freestyle | LCM | 4:17.96 | Sectionals ✓+18.87s to US Open | 2021-07-17 | 2021 Speedo Sectional Meetvenue |
| 800 Freestyle | LCM | 8:59.73 | Sectionals ✓+44.34s to US Open | 2019-08-01 | 2019 WI Central Zone 14 & U Championshipslow pool |
| 1500 Freestyle | LCM | 17:11.47 | Sectionals ✓+80.08s to US Open | 2021-07-15 | 2021 Speedo Sectional Meetvenue |
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.
PR splits
200 Freestyle SCY 1:41.08
Front half 49.14s · back half 51.94s
500 Freestyle SCY 4:30.70
Front half 133.45s · back half 137.25s
1650 Freestyle SCY 15:38.72
200 Freestyle LCM 2:04.04
Front half 59.49s · back half 64.55s
400 Freestyle LCM 4:17.96
Front half 127.67s · back half 130.29s
800 Freestyle LCM 8:59.73
Front half 265.05s · back half 274.68s
1500 Freestyle LCM 17:11.47
Front half 504.64s · back half 526.83s
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.