|Date of birth||21 September 1981|
|Place of birth||Zimbabwe|
|Height||1.91 m (6 ft 3 in)|
|Weight||108 kg (17 st 0 lb) |
|Rugby union career|
|Position||Flanker / Number eight|
Kai Horstmann (born 21 September 1981) is an English rugby union player who plays for Exeter Chiefs in the Aviva Premiership. He formerly played for Worcester Warriors and Harlequins. During his time at Harlequins he was reported as being a squad member for Harlequins Rugby League club but never turned out for the RL team.
Horstmann was a firm favourite of both the players and supporters and was voted players player-of-the-year in the 2005–06 and 2006–07 seasons and managed a double in 2008–09 when he was voted both Club player-of-the-year and Players player-of-the-year. Horstmann captained Worcester in the 2011–12 season but injury meant he missed a lot of games.
Horstmann plays as number eight or flanker, and has represented the England Saxons for the Churchill Cup tour of North America in July 2006. He was also a member of the IRB World Sevens Series squad in 2003–04 season.
- "Aviva Premiership Rugby - Worcester Warriors". web page. Premier Rugby. Retrieved 26 September 2011.
- "Worcester Warriors' Kai Horstmann and Dale Rasmussen to leave club". BBC Sport. 17 April 2012. Retrieved 27 May 2012.
- "Exeter sign Worcester back-row forward Kai Horstmann". BBC Sport. 3 May 2012. Retrieved 27 May 2012.
- "Hodgson to captain England Saxons in Barclays Churchill Cup opener". RFU. Retrieved 31 May 2006.