| Oberliga Mittelrhein 2023/2024 - Appearances as Referee |  |
 |
 |
||||
| 15/10/2023 | Siegburger SV 04 | - | FC Hennef 05 | 1:3 | 6 | - | - |
| 21/04/2024 | Fortuna Köln II | - | Germania Teveren | 3:2 | 4 | - | - |
| Oberliga Mittelrhein 2023/2024 - Appearances as Referee | |
|
|
||||
| 15/10/2023 | Siegburger SV 04 | - | FC Hennef 05 | 1:3 | 6 | - | - |
| 21/04/2024 | Fortuna Köln II | - | Germania Teveren | 3:2 | 4 | - | - |
| Complete name: | Mario Heller |
| Born: | 24/03/1989 |
| Place of birth: |
Germany |
| Residence: | Köln |
| Nationality: |
Germany |
| Club: | SV Westhoven-Ensen 1931 |