| DFB-Pokal 1990/1991 - Appearances as Referee |  |
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| 04/08/1990 | SpVgg Fürth | - | Borussia Dortmund | 3:1 | 5 | - | 1 |
| 30/11/1990 | Werder Bremen | - | FC Schalke 04 | 3:1 | 1 | - | - |
| DFB-Pokal 1990/1991 - Appearances as Referee | |
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| 04/08/1990 | SpVgg Fürth | - | Borussia Dortmund | 3:1 | 5 | - | 1 |
| 30/11/1990 | Werder Bremen | - | FC Schalke 04 | 3:1 | 1 | - | - |
| Complete name: | Rainer Boos |
| Born: | 16/08/1946 |
| Place of birth: |
Germany |
| Residence: | Kronberg |
| Nationality: |
Germany |
| Bundesliga (GER) appearances: | 66 |