| Bundesliga 1988/1989 Upper Play-Off - Appearances as Referee |  |
 |
 |
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| 31/03/1989 | Wiener Sport-Club | - | Admira/Wacker | 6:2 | 3 | - | - |
| 28/04/1989 | First Vienna FC | - | Austria Wien | 3:2 | 5 | - | - |
| 02/06/1989 | Austria Wien | - | Rapid Wien | 2:1 | 4 | - | 1 |
| Bundesliga 1988/1989 Upper Play-Off - Appearances as Referee | |
|
|
||||
| 31/03/1989 | Wiener Sport-Club | - | Admira/Wacker | 6:2 | 3 | - | - |
| 28/04/1989 | First Vienna FC | - | Austria Wien | 3:2 | 5 | - | - |
| 02/06/1989 | Austria Wien | - | Rapid Wien | 2:1 | 4 | - | 1 |
| Complete name: | Heinz Prohaska |
| Born: | 26/04/1944 |
| Place of birth: |
Wien, 
Austria |
| Nationality: |
Austria |
| Profession: | Briefträger |