Career
His regular position is lock. Youth
Kleyn first played provincial rugby for the Western Province U19s during the 2012 Under-19 Provincial Championship, also being promoted to the Western Province U21 side in the same season, as well as in 2013. Western Province / Stormers
Despite being named in the 2013 and 2014 Vodacom Cup squads, Kleyn never made an appearance, suffering a knee injury in 2013 and an ankle injury in 2014.
He was included in the Stormers squad for the 2014 Super Rugby season.
Despite missing the early part of the season with his ankle injury, Kleyn recovered to be named in the starting line-up for their match against the Bulls in Pretoria.