| DFB-Pokal 2023/2024 - Appearances as Assistant | ||||
| 12/08/2023 | Arminia Bielefeld | - | VfL Bochum | 4:1 pso |
| 31/10/2023 | 1. FC Kaiserslautern | - | 1. FC Köln | 3:2 |
| DFB-Pokal 2023/2024 - Appearances as Assistant | ||||
| 12/08/2023 | Arminia Bielefeld | - | VfL Bochum | 4:1 pso |
| 31/10/2023 | 1. FC Kaiserslautern | - | 1. FC Köln | 3:2 |
| Complete name: | Lasse Koslowski |
| Born: | 14/07/1987 |
| Place of birth: |
Berlin, 
Germany |
| Residence: | Berlin |
| Nationality: |
Germany |
| Profession: | selbständig |
| Club: | Frohnauer SC |