| KNVB beker 1985/1986 - Appearances as Referee |  |
 |
 |
||||
| 09/10/1985 | AFC Ajax | - | Sparta Rotterdam | 3:0 | 1 | - | - |
| 23/11/1985 | Feyenoord | - | PSV Eindhoven | 4:1 | - | - | - |
| 06/05/1986 | NEC Nijmegen | - | AFC Ajax | 1:3 | 2 | - | - |
| KNVB beker 1985/1986 - Appearances as Referee | |
|
|
||||
| 09/10/1985 | AFC Ajax | - | Sparta Rotterdam | 3:0 | 1 | - | - |
| 23/11/1985 | Feyenoord | - | PSV Eindhoven | 4:1 | - | - | - |
| 06/05/1986 | NEC Nijmegen | - | AFC Ajax | 1:3 | 2 | - | - |
| Complete name: | Johannes Nicolaus Ignacius Keizer |
| Born: | 06/10/1940 † 18/11/2024 |
| Place of birth: |
Volendam, 
Netherlands |
| Nationality: |
Netherlands |