| Bundesliga 1986/1987 Upper Play-Off - Appearances as Referee |  |
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 |
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| 03/04/1987 | Sturm Graz | - | SK VOEST Linz | 3:1 | 2 | - | - |
| 07/05/1987 | Wiener Sport-Club | - | Rapid Wien | 1:1 | 5 | - | - |
| 12/06/1987 | Sturm Graz | - | FC Tirol | 0:2 | 3 | - | - |
| Bundesliga 1986/1987 Upper Play-Off - Appearances as Referee | |
|
|
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| 03/04/1987 | Sturm Graz | - | SK VOEST Linz | 3:1 | 2 | - | - |
| 07/05/1987 | Wiener Sport-Club | - | Rapid Wien | 1:1 | 5 | - | - |
| 12/06/1987 | Sturm Graz | - | FC Tirol | 0:2 | 3 | - | - |
| Complete name: | Heinz Prohaska |
| Born: | 26/04/1944 |
| Place of birth: |
Wien, 
Austria |
| Nationality: |
Austria |
| Profession: | Briefträger |