| DFB-Pokal 1988/1989 - Appearances as Referee |  |
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| 05/08/1988 | Arminia Bielefeld | - | VfL Bochum | 0:0 aet | 4 | - | - |
| DFB-Pokal 1988/1989 - Appearances as Referee | |
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| 05/08/1988 | Arminia Bielefeld | - | VfL Bochum | 0:0 aet | 4 | - | - |
| Complete name: | Joachim Ren |
| Born: | 07/09/1950 |
| Place of birth: |
Germany |
| Residence: | Salzgitter |
| Nationality: |
Germany |