| Europa League 1983/1984 - Appearances as Referee |  |
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 |
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| 13/09/1983 | Widzew Łódź | - | IF Elfsborg | 0:0 | - | - | - |
| 01/11/1983 | Royal Antwerp FC | - | RC Lens | 2:3 | - | - | - |
| Europa League 1983/1984 - Appearances as Referee | |
|
|
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| 13/09/1983 | Widzew Łódź | - | IF Elfsborg | 0:0 | - | - | - |
| 01/11/1983 | Royal Antwerp FC | - | RC Lens | 2:3 | - | - | - |
| Complete name: | Jakob Baumann |
| Born: | 22/09/1941 |
| Place of birth: |
Switzerland |
| Residence: | Schaffhausen |
| Nationality: |
Switzerland |