| Oberliga Mittelrhein 2019/2020 - Appearances as Referee |  |
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| 25/08/2019 | SV Deutz 05 | - | FC Pesch 1956 | 3:3 | 3 | - | - |
| 27/09/2019 | FC Wegberg-Beeck | - | SV 1914 Eilendorf | 3:1 | 3 | 1 | - |
| Oberliga Mittelrhein 2019/2020 - Appearances as Referee | |
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| 25/08/2019 | SV Deutz 05 | - | FC Pesch 1956 | 3:3 | 3 | - | - |
| 27/09/2019 | FC Wegberg-Beeck | - | SV 1914 Eilendorf | 3:1 | 3 | 1 | - |
| Complete name: | Mario Heller |
| Born: | 24/03/1989 |
| Place of birth: |
Germany |
| Residence: | Köln |
| Nationality: |
Germany |
| Club: | SV Westhoven-Ensen 1931 |