| Primera División 1945/1946 - Appearances as Referee |  |
 |
 |
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| 20/01/1946 | Athletic Bilbao | - | Real Murcia | 6:1 | - | - | - |
| 31/03/1946 | Athletic Bilbao | - | Atlético Aviación | 0:2 | - | - | - |
| Primera División 1945/1946 - Appearances as Referee | |
|
|
||||
| 20/01/1946 | Athletic Bilbao | - | Real Murcia | 6:1 | - | - | - |
| 31/03/1946 | Athletic Bilbao | - | Atlético Aviación | 0:2 | - | - | - |
| Complete name: | Simón Isasi Castresana |
| Born: | |
| Place of birth: |
Santander, 
Spain |
| Nationality: |
Spain |