| Oberliga Mittelrhein 2020/2021 - Appearances as Referee |  |
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| 20/09/2020 | 1. FC Düren | - | BC Viktoria Glesch-Paffendorf | 3:0 | - | - | - |
| Oberliga Mittelrhein 2020/2021 - Appearances as Referee | |
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| 20/09/2020 | 1. FC Düren | - | BC Viktoria Glesch-Paffendorf | 3:0 | - | - | - |
| Complete name: | Mario Heller |
| Born: | 24/03/1989 |
| Place of birth: |
Germany |
| Residence: | Köln |
| Nationality: |
Germany |
| Club: | SV Westhoven-Ensen 1931 |