| KNVB beker 1977/1978 - Appearances as Referee |  |
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| 08/10/1977 | Fortuna SC | - | De Graafschap | 3:2 aet | - | - | - |
| 19/11/1977 | WVV Wageningen | - | FC VVV | 2:0 aet | 3 | - | - |
| 04/02/1978 | WVV Wageningen | - | AZ '67 Alkmaar | 1:2 | - | - | - |
| KNVB beker 1977/1978 - Appearances as Referee | |
|
|
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| 08/10/1977 | Fortuna SC | - | De Graafschap | 3:2 aet | - | - | - |
| 19/11/1977 | WVV Wageningen | - | FC VVV | 2:0 aet | 3 | - | - |
| 04/02/1978 | WVV Wageningen | - | AZ '67 Alkmaar | 1:2 | - | - | - |
| Complete name: | Johannes Nicolaus Ignacius Keizer |
| Born: | 06/10/1940 † 18/11/2024 |
| Place of birth: |
Volendam, 
Netherlands |
| Nationality: |
Netherlands |