| Bundesliga 1989/1990 - Appearances as Referee |  |
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| 03/08/1989 | Vorwärts Steyr | - | Kremser SC | 3:1 | 3 | - | - |
| 08/09/1989 | Austria Wien | - | Grazer AK | 1:0 | 3 | - | - |
| 22/09/1989 | Vorwärts Steyr | - | Admira/Wacker | 1:1 | 6 | - | - |
| Bundesliga 1989/1990 - Appearances as Referee | |
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| 03/08/1989 | Vorwärts Steyr | - | Kremser SC | 3:1 | 3 | - | - |
| 08/09/1989 | Austria Wien | - | Grazer AK | 1:0 | 3 | - | - |
| 22/09/1989 | Vorwärts Steyr | - | Admira/Wacker | 1:1 | 6 | - | - |
| Complete name: | Udo Kratzer |
| Born: | 12/02/1945 |
| Place of birth: |
Austria |
| Nationality: |
Austria |