| Playoffs Eredivisie 2018/2019 Relegation - Appearances as Referee |  |
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| 22/05/2019 | De Graafschap | - | SC Cambuur | 2:0 | 8 | - | - |
| Playoffs Eredivisie 2018/2019 Relegation - Appearances as Referee | |
|
|
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| 22/05/2019 | De Graafschap | - | SC Cambuur | 2:0 | 8 | - | - |
| Complete name: | Siemen Mulder |
| Born: | 23/11/1983 |
| Place of birth: |
Netherlands |
| Residence: | Uithuizen |
| Nationality: |
Netherlands |