| Oberliga Mittelrhein 2022/2023 - Appearances as Referee |  |
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| 27/08/2022 | Bonner SC | - | FC Pesch 1956 | 5:0 | 1 | - | - |
| 04/09/2022 | FC Pesch 1956 | - | Blau-Weiß Friesdorf | 6:0 | - | - | - |
| 29/10/2022 | Bonner SC | - | Siegburger SV 04 | 2:0 | 7 | - | - |
| Oberliga Mittelrhein 2022/2023 - Appearances as Referee | |
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| 27/08/2022 | Bonner SC | - | FC Pesch 1956 | 5:0 | 1 | - | - |
| 04/09/2022 | FC Pesch 1956 | - | Blau-Weiß Friesdorf | 6:0 | - | - | - |
| 29/10/2022 | Bonner SC | - | Siegburger SV 04 | 2:0 | 7 | - | - |
| Complete name: | David Markus Koj |
| Born: | 26/09/1993 |
| Place of birth: |
Germany |
| Residence: | Wegberg |
| Nationality: |
Germany |
| Profession: | Beisitzer |
| Club: | Sportclub Wegberg 1912 |