In 2012, he was included in the Leopards' Currie Cup squad, but failed to make an appearance.

[2] He joined the Pretoria-based Bulls on a one-year deal for the 2017 Super Rugby season.

[3] On 24 April 2019 it was announced that he would be joining the Sale Sharks ahead of the 2019–20 Premiership season.

[4] In May 2014, De Jager was one of eight uncapped players that were called up to a Springbok training camp prior to the 2014 mid-year rugby union internationals.

[5] De Jager was named in South Africa's squad for the 2019 Rugby World Cup.