James Marriott has 4 recorded races from GB.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2025-04-13 | Schneider Electric Marathon de Paris 2025 — Schneider Electric Marathon de Paris | Marathon | 3:12:18 | 3970 |
| BMW Berlin Marathon 2025 | Marathon | 3:14:17 | 3893 | |
| TCS London Marathon 2025 | Marathon | 3:26:13 | 7722 |