| Veikkausliiga 2023 Relegation - Appearances as Referee |  |
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| 01/10/2023 | Haka Valkeakoski | - | FC Lahti | 2:0 | 4 | - | - |
| 21/10/2023 | AC Oulu | - | Haka Valkeakoski | 1:1 | 3 | - | - |
| Veikkausliiga 2023 Relegation - Appearances as Referee | |
|
|
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| 01/10/2023 | Haka Valkeakoski | - | FC Lahti | 2:0 | 4 | - | - |
| 21/10/2023 | AC Oulu | - | Haka Valkeakoski | 1:1 | 3 | - | - |
| Complete name: | Petri Juhani Viljanen |
| Born: | 00/00/1987 |
| Place of birth: |
Finland |
| Nationality: |
Finland |