| KNVB beker 1967/1968 - Appearances as Referee |  |
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 |
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| 31/12/1967 | AFC Ajax | - | De Volewijckers | 4:1 | - | - | - |
| 25/02/1968 | ZFC Zaandam | - | AZ '67 Alkmaar | 0:0 | - | - | - |
| 24/03/1968 | RC&FC Sparta | - | Hermes/DVS | 3:1 | - | - | - |
| KNVB beker 1967/1968 - Appearances as Referee | |
|
|
||||
| 31/12/1967 | AFC Ajax | - | De Volewijckers | 4:1 | - | - | - |
| 25/02/1968 | ZFC Zaandam | - | AZ '67 Alkmaar | 0:0 | - | - | - |
| 24/03/1968 | RC&FC Sparta | - | Hermes/DVS | 3:1 | - | - | - |
| Complete name: | Joop Mulders |
| Born: | 22/02/1924 |
| Place of birth: |
Leidschendam, 
Netherlands |
| Nationality: |
Netherlands |