| KNVB beker 1981/1982 - Appearances as Referee |  |
 |
 |
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| 04/09/1981 | ACV Vitesse | - | Helmond Sport | 2:0 | 2 | - | - |
| 16/02/1982 | Drechtsteden '79 | - | FC Utrecht | 1:1 | 1 | - | - |
| KNVB beker 1981/1982 - Appearances as Referee | |
|
|
||||
| 04/09/1981 | ACV Vitesse | - | Helmond Sport | 2:0 | 2 | - | - |
| 16/02/1982 | Drechtsteden '79 | - | FC Utrecht | 1:1 | 1 | - | - |
| Complete name: | Johannes Nicolaus Ignacius Keizer |
| Born: | 06/10/1940 † 18/11/2024 |
| Place of birth: |
Volendam, 
Netherlands |
| Nationality: |
Netherlands |