Mark Janson-Smith has 4 recorded races.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| TCS London Marathon 2026 | Marathon | 5:10:48 | 42927 | |
| TCS London Marathon 2024 | Marathon | 3:56:41 | 19355 | |
| BMW Berlin Marathon 2024 | Marathon | 3:59:35 | 20128 | |
| TCS London Marathon 2022 | Marathon | 4:04:42 | 13921 |