- K. Bukusu
FK Zalgiris VilniusFree—1 Jul 2024 - D. Beleme
Hamburger SVLoan—31 Jan 2024 
Y. Stein
Union BerlinLoan—9 Jan 2024- E. Gründemann
SV Elversberg——1 Jul 2021 - P. Steinwender
SC Paderborn 07Loan—9 Oct 2020 
E. Zehir
FC St. PauliLoan—3 Oct 2020- M. Schuchardt
Holstein Kiel——2 Jul 2018 - J. Ebot-Etchi
VfL WolfsburgFree—1 Jul 2016 - Marc LindenbergHamburger SV——1 Jan 2016
- T. Barendt
Bayer Leverkusen——1 Jul 2015
- Rohin ShivaniHamburger SVReturn from loan—29 Jun 2026
A. Verinac
FC ST. GallenTransfer—27 Jan 2026- J. X. PosseltSC Paderborn 07Free agent—16 Jul 2025
- J. X. PosseltSC Paderborn 07Free agent—16 Jul 2025
- D. BelemeHamburger SV——1 Jul 2024
- Y. SteinUnion Berlin——1 Jul 2024
- P. SteinwenderSC Paderborn 07——1 Jul 2021
- L. WolfHolstein Kiel——1 Jul 2021
- A. ArslanHolstein KielFree—1 Jul 2020
- A. ArslanHamburger SVFree—1 Jul 2014
- S. JakubiakFC St. Pauli——1 Jul 2013
- Mustafa ZazaiFC St. Pauli——1 Jul 2013