Ja-Cheol Koo History
| Clubs | Country | Position | NO | From | To | Loan |
|---|---|---|---|---|---|---|
 Jeju United | South Korea | Midfielder | 7 | 01/08/2007 | 31/01/2011 | |
 VfL Wolfsburg | Germany | Midfielder | 5 | 31/01/2011 | 01/07/2012 | |
 FC Augsburg | Germany | Midfielder | 14 | 31/01/2012 | 01/06/2012 | Y |
FC Augsburg | Germany | Midfielder | 7 | 01/07/2012 | 01/07/2013 | |
VfL Wolfsburg | Germany | Midfielder | 01/07/2013 | 20/01/2014 | ||
 1. FSV Mainz 05 | Germany | Midfielder | 13 | 20/01/2014 | 31/08/2015 | |
FC Augsburg | Germany | Midfielder | 31/08/2015 | 02/08/2019 |
| Country | Position | From | To |
|---|---|---|---|
 South Korea | Midfielder | 01/01/2008 |
NO = Player number .