Jean Kleyn (born 26 August 1993) is a South African-born Irish professional rugby union player, currently playing for Irish United Rugby Championship and European Rugby Champions Cup side Munster. He has represented Ireland after qualifying through residency as a 'project player'. Kleyn was born and grew up in South Africa, and qualified for Ireland through residency. His regular position is lock. Youth rugby Kleyn first played provincial rugby for the s during the 2012 Under-19 Provincial Championship, also being promoted to the side in the same season, as well as in 2013. He picked up two winner's medals, with Western Province ending both the 2012 Under-19 Provincial Championship and 2013 Under-21 Provincial Championship seasons as champions. Despite playing regularly for the senior side in 2014, he made a further three appearances in the 2014 Under-19 Provincial Championship. 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. Kleyn was included in the 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 in Pretoria, but ended on the losing side as the home team won 28–12. A further three appearances off the bench followed in May 2014. In the second half of 2014, Kleyn was a key player for in the 2014 Currie Cup Premier Division, starting ten matches during the season. The final two of his starts came in their 31–23 semi-final victory over the and the final, in which Kleyn played the entire 80 minutes, helping his side to a 19–16 victory over the to win his first senior trophy. Kleyn established himself as a regular in the Stormers squad during the 2015 Super Rugby season, appearing in thirteen of their seventeen matches, including five starts. He helped the Stormers finish top of the South African Conference, and also played in their qualifier against the , a match won by the Australian visitors to eliminate the Stormers from the competition. He once again was a key player for a Western Province team attempting to retain their Currie Cup title in the 2015 competition, playing in all twelve matches, of which he started eleven. The team finished third on the log and Kleyn started