Frederick Slemeck has 4 recorded races.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| TCS London Marathon 2026 | Marathon | 2:27:26 | 113 | |
| TCS London Marathon 2025 | Marathon | 2:28:25 | 133 | |
| TCS London Marathon 2024 | Marathon | 2:23:31 | 35 | |
| TCS London Marathon 2023 | Marathon | 2:25:53 | 45 |