| Youth Bundesliga Süd/Südwest 2013/2014 - Appearances as Referee |  |
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| 10/08/2013 | Eintracht Frankfurt | - | Bayern München | 3:0 | 2 | - | - |
| 24/08/2013 | 1. FC Kaiserslautern | - | Karlsruher SC | 4:2 | 3 | - | - |
| 23/02/2014 | Eintracht Frankfurt | - | VfB Stuttgart | 3:2 | 5 | - | - |
| Youth Bundesliga Süd/Südwest 2013/2014 - Appearances as Referee | |
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|
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| 10/08/2013 | Eintracht Frankfurt | - | Bayern München | 3:0 | 2 | - | - |
| 24/08/2013 | 1. FC Kaiserslautern | - | Karlsruher SC | 4:2 | 3 | - | - |
| 23/02/2014 | Eintracht Frankfurt | - | VfB Stuttgart | 3:2 | 5 | - | - |
| Complete name: | Mario Heller |
| Born: | 24/03/1989 |
| Place of birth: |
Germany |
| Residence: | Köln |
| Nationality: |
Germany |
| Club: | SV Westhoven-Ensen 1931 |