| Player | Matches | Goals | Penalties | First match | Last match |
|---|---|---|---|---|---|
| Iddrisu, Razak | 8 | 0 | 0 | 2011-10-11 | 2012-05-30 |
| Ikpide, Kevin | 3 | 0 | 0 | 2013-05-12 | 2013-05-15 |
| Ilicevic, Niko | 5 | 2 | 0 | 2025-09-08 | 2025-11-18 |
| Is, Ebu Bekir | 5 | 0 | 0 | 2023-09-08 | 2024-03-25 |
| Isler, Izzet | 3 | 0 | 0 | 2015-09-14 | 2016-02-04 |
| Itter, Davide-Jerome | 8 | 0 | 0 | 2014-09-14 | 2015-05-20 |
| Itter, Gian-Luca | 7 | 0 | 0 | 2014-09-12 | 2015-05-20 |
| Itter, Pascal | 9 | 0 | 0 | 2010-10-15 | 2011-05-25 |
| Ivelj, Romeo | 2 | 0 | 0 | 2020-10-09 | 2020-10-12 |
| Izekor, Ken | 11 | 3 | 0 | 2022-09-23 | 2023-05-28 |
| Jaber, Ali | 4 | 0 | 0 | 2023-11-19 | 2024-02-14 |
| Jacobsen, Thore | 10 | 0 | 0 | 2012-10-05 | 2013-06-04 |
| Jäger, Marvin | 1 | 0 | 0 | 2012-05-22 | 2012-05-22 |
| Jais, Daniel | 2 | 1 | 0 | 2008-10-16 | 2008-10-19 |
| Janitzek, Justin | 2 | 0 | 0 | 2019-10-09 | 2019-10-12 |
| Jastrzembski, Dennis | 5 | 1 | 0 | 2016-02-04 | 2016-04-14 |
| Jeltsch, Finn | 4 | 2 | 0 | 2021-10-26 | 2022-02-12 |
| Jenne, Christian | 2 | 0 | 0 | 2012-10-05 | 2012-10-08 |
| Jensen, Pelle | 1 | 0 | 0 | 2008-05-29 | 2008-05-29 |
| Jessen, Niklas | 2 | 0 | 0 | 2019-02-07 | 2019-02-11 |
| John, Marco | 6 | 2 | 1 | 2017-11-11 | 2018-05-22 |
| Jordanov, Edisson | 2 | 0 | 0 | 2008-09-16 | 2008-09-20 |
| Jungwirth, Florian | 5 | 0 | 0 | 2004-10-01 | 2005-05-19 |
| Kabar, Almugera | 9 | 3 | 0 | 2021-09-02 | 2022-05-05 |
| Kabuya, Jean Patrice | 2 | 0 | 0 | 2015-09-12 | 2015-09-14 |
| Kabuya, Justin | 1 | 0 | 0 | 2015-09-12 | 2015-09-12 |
| Kacik, Fitim | 5 | 1 | 0 | 2003-10-14 | 2004-04-12 |
| Kacinoglu, Koray | 4 | 0 | 0 | 2009-11-19 | 2010-06-02 |
| Kade, Anton | 2 | 0 | 0 | 2019-09-05 | 2019-09-08 |
| Kade, Julius | 2 | 0 | 0 | 2015-03-18 | 2015-03-20 |
| Kakoko, Yannick | 4 | 0 | 0 | 2005-09-19 | 2006-03-23 |
| Kammerbauer, David | 6 | 0 | 0 | 2012-10-05 | 2013-06-04 |
| Kammerbauer, Patrick | 5 | 0 | 0 | 2012-10-08 | 2013-03-28 |
| Karakas, Erdinc | 1 | 1 | 0 | 2014-06-04 | 2014-06-04 |
| Karan, Burak | 5 | 0 | 0 | 2002-08-26 | 2002-11-18 |
| Karaoglan, Arif | 4 | 1 | 0 | 2001-08-21 | 2002-03-28 |
| Karg Lara, David | 2 | 0 | 0 | 2008-11-22 | 2008-11-24 |
| Kargbo, Abu Bakarr | 10 | 4 | 0 | 2007-11-23 | 2008-05-29 |
| Karius, Loris | 3 | 0 | 0 | 2008-09-16 | 2008-11-22 |
| Karkoschka, Adrian | 4 | 1 | 0 | 2004-04-07 | 2004-04-12 |
| Karl, Lennart | 9 | 5 | 1 | 2023-09-08 | 2024-03-25 |
| Kasten, Lino | 3 | 0 | 0 | 2016-10-03 | 2017-05-30 |
| Katterbach, Noah | 2 | 0 | 0 | 2017-03-22 | 2017-03-24 |
| Käuper, Ole | 9 | 3 | 0 | 2012-10-05 | 2013-04-01 |
| Kayaroglu, Muhammed | 1 | 0 | 0 | 2012-05-22 | 2012-05-22 |
| Kehl, Jonas | 1 | 0 | 0 | 2017-05-30 | 2017-05-30 |
| Kehrer, Thilo | 1 | 1 | 0 | 2012-05-23 | 2012-05-23 |
| Keller, Noah | 7 | 0 | 0 | 2023-09-08 | 2024-02-14 |
| Kempe, Dennis | 1 | 0 | 0 | 2001-08-21 | 2001-08-21 |
| Kempf, Marc Oliver | 5 | 1 | 0 | 2010-10-15 | 2011-05-25 |