- Leon Prosche
Union BerlinLoan—30 Jun 2026 - Leon ProscheUnion BerlinLoan—30 Jun 2026
J. Collins
CardiffFree agent—25 Sept 2025- J. Ehlers
Holstein KielFree agent—30 Jun 2025 - J. EhlersHolstein KielFree agent—30 Jun 2025
M. Schmid
1. FC KölnTransfer—30 Jan 2025- M. Schmid1. FC KölnTransfer—29 Jan 2025
J. Schwirten1. FC KölnFree—1 Jul 2023- L. Lord
Werder BremenFree—1 Jul 2023 - S. Schreck
Groningen——6 Aug 2022 
P. Owusu
SC Paderborn 07——13 Jan 2022
J. Lang
VfL Wolfsburg——13 Jan 2022- A. Mance
NK OsijekLoan—25 Aug 2021 - S. SchreckGroningenLoan—28 Jul 2021
T. Kips
F91 Dudelange——15 Jul 2021
B. ZolinskiSC Paderborn 07Free—16 Sept 2020
J. Rasmussen
FiorentinaLoan—12 Jan 2020
M. Mihojević
PAOKLoan—4 Jul 2019- H. Çiftçi1. FC KölnFree—1 Jul 2019
C. Daferner
SC FreiburgLoan—1 Jul 2019
O. Sijarić
HNK RijekaFree agent—30 Jun 2025- O. SijarićHNK RijekaTransfer—26 Jun 2025
S. Messeguem
Academico Viseu——22 Jul 2022- S. SchreckGroningen——1 Jul 2022
D. Carlson
ADO Den HaagFree—29 Jun 2022
Babacar Gueye
KocaelisporFree—8 Feb 2022- A. ManceNK Osijek——27 Jan 2022
- C. DafernerSC Freiburg——1 Jul 2020
J. Král
Mlada Boleslav——1 Jul 2019
N. RappUnion Berlin€ 900K13 Jan 2019- A. Ferati
Hamburger SV——1 Jul 2018 - M. Maria
TwenteFree—30 Jan 2018 - S. Handle
SV ElversbergLoan—28 Jan 2017 - Hannes Anier
Flora Tallinn——14 Sept 2015 
A. Novikovas
VfL Bochum——1 Jul 2015- S. Alibaz
Konyaspor——1 Jul 2015 - C. Fandrich
RB Leipzig——1 Jun 2015 
H. Anier
Dundee Utd——16 Jan 2015- G. Koçer
Gençlerbirliği S.K.——1 Jul 2014