| KNVB beker 1973/1974 - Appearances as Referee |  |
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| 26/08/1973 | Fortuna Vlaardingen | - | SC Amersfoort | 1:4 pso | 1 | - | - |
| 19/01/1974 | FC Utrecht | - | Willem II | 2:0 | 1 | - | - |
| KNVB beker 1973/1974 - Appearances as Referee | |
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|
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| 26/08/1973 | Fortuna Vlaardingen | - | SC Amersfoort | 1:4 pso | 1 | - | - |
| 19/01/1974 | FC Utrecht | - | Willem II | 2:0 | 1 | - | - |
| Complete name: | Gerard Jonker |
| Born: | |
| Place of birth: |
Netherlands |
| Nationality: |
Netherlands |