Michael Grethe has 4 recorded races.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| BMW Berlin Marathon 2025 | Marathon | 5:27:05 | 27659 | |
| BMW Berlin Marathon 2024 | Marathon | 4:35:50 | 27477 | |
| BMW Berlin Marathon 2023 | Marathon | 4:38:10 | 22153 | |
| BMW Berlin Marathon 2022 | Marathon | 4:40:21 | 18245 |