Kai Horstmann History
| Club | Country | Position | NO | From | To |
|---|---|---|---|---|---|
| Harlequins | England | Blindside Flanker | 01/08/2002 | 01/08/2005 | |
| England Saxons | England | No. 8 | 01/01/2005 | 01/01/2008 | |
| Worcester Warriors | England | Blindside Flanker | 01/08/2005 | 01/07/2012 | |
| Exeter Chiefs | England | No. 8 | 01/07/2012 | 01/07/2018 |
NO = Player number .