| nickname(s) |  - |
| position(s) | Forward |
| preferred foot | Left |
| height [cm] • weight [kg] | 177 • 77 |
| date of birth [dd/mm/yyyy] | 20/02/2000 |
| place of birth |  Rendsburg |
| nationality(ies) | German Polish |
| • 29/10/2021 Men's Under 21s: Dennis Jastrzembski has been added to the squad for 2023 UEFA Under 21 Championship qualifiers against Germany and Latvia |
| • 24/09/2021 Men's Under 21s: Dennis Jastrzembski has been added to the squad for 2023 UEFA Under 21 Championship qualifiers against Hungary and San Marino |
| • 18/09/2020 Men's Under 21s: Squad selected for 2021 UEFA Under 21 Championship qualifiers against Serbia and Bulgaria |
| • 06/03/2020 Men's Under 20s: Squad selected for Elite League matches against England and Czech Republic |