- D. Donkor
1899 HoffenheimTransfer—27 Aug 2026 - T. de Jong
SC Paderborn 07——9 Jul 2026 - K. YalcinSC Paderborn 07Free agent—5 Jul 2026
- D. Murray
SC FreiburgLoan—2 Aug 2025 
Hong Seok-Ju
FC Schalke 04Free agent—28 Jul 2025- Hong Seok-JuFC Schalke 04Free agent—29 Jun 2025
- V. Boesen
SV Elversberg——1 Jul 2021 - N. WinterSV ElversbergFree—1 Oct 2020
- P. Bade
Borussia MönchengladbachFree—6 Jul 2018 - Andreas Ogrzall
Borussia Dortmund——1 Jul 2016 - Oliver DingsFC Schalke 04——1 Jul 2016
- T. KurtBorussia Dortmund——1 Jul 2016
- A. Budimbu
1. FC KölnFree—26 Jan 2016 - David JansenSC Paderborn 07Free—20 Jan 2012
- Felix Schiller
Werder BremenFree—1 Jul 2011 - Nedim HasanbegovicBorussia DortmundFree—1 Jul 2011
- Christopher KullmannBorussia DortmundFree—1 Jul 2011
- M. LamidiBorussia MönchengladbachFree—1 Jul 2010
- H. Schmidtgal
VfL BochumFree—1 Jul 2009 - Christopher NötheBorussia DortmundLoan—17 Aug 2008
- Hong Seok-Ju
Patro EisdenFree agent—30 Jun 2026 - D. MurraySC FreiburgReturn from loan—24 Jun 2026
- K. YalcinSC Paderborn 07Free agent—30 Jun 2025
- D. Donkor1899 HoffenheimFree agent—29 Jun 2025
J. HeekerenFC Schalke 04€ 180K1 Jul 2022
O. SteurerBorussia Dortmund——1 Jul 2017- F. HerzenbruchSC Paderborn 07Free—1 Jul 2016
G. Jung
Hamburger SV€ 100K1 Jul 2014- P. TalarskiFC Schalke 04——1 Jul 2014