| DFB-Pokal 2018/2019 - Appearances as Assistant | ||||
| 24/04/2019 | Werder Bremen | - | Bayern München | 2:3 |
| DFB-Pokal 2018/2019 - Appearances as Assistant | ||||
| 24/04/2019 | Werder Bremen | - | Bayern München | 2:3 |
| Complete name: | Lasse Koslowski |
| Born: | 14/07/1987 |
| Place of birth: |
Berlin, 
Germany |
| Residence: | Berlin |
| Nationality: |
Germany |
| Profession: | selbständig |
| Club: | Frohnauer SC |