| Youth B Bundesliga Süd/Südwest 2008/2009 - Appearances as Referee |  |
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| 06/09/2008 | SpVgg Greuther Fürth | - | SC Freiburg | 3:3 | 5 | - | - |
| Youth B Bundesliga Süd/Südwest 2008/2009 - Appearances as Referee | |
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|
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| 06/09/2008 | SpVgg Greuther Fürth | - | SC Freiburg | 3:3 | 5 | - | - |
| Complete name: | Lasse Koslowski |
| Born: | 14/07/1987 |
| Place of birth: |
Berlin, 
Germany |
| Residence: | Berlin |
| Nationality: |
Germany |
| Profession: | selbständig |
| Club: | Frohnauer SC |