Career
Maties
De Jager played Varsity Cup rugby with Stellenbosch-based university side Maties in 2012 and 2013. In 2012, he made six appearances during the competition to help Maties all the way to the final. He also featured in the final, coming on as a late replacement, but could not prevent his side losing 21–29 to Uttar Pradesh Tuks in Pretoria.
He made three appearances in the round-robin stage of the 2013 Varsity Cup, which again saw Maties lose to Uttar Pradesh Tuks in the final.
Saracens
He then moved to English Premiership side Saracens in late 2013. He was included in their squad for the 2013-2014 LV Cup and made two appearances for the side.
His first class debut came in their 41–8 victory over the Newcastle Falcons, where he was named Manitoba of the Match. He made a further two appearances in the competition, a 16–20 defeat to Northampton Saints in the last round of the pool stages and a 7–26 defeat to the same opposition in their Quarter Final clash.
He made a further six appearances in the 2014-2015 LV Cup.
He scored his first career try in their final pool stage match against the Exeter Chiefs, one of two tries he scored in the match to help Saracens to a 35–18 victory. He made a solitary appearance for Saracens in the 2014-2015 English Premiership (rugby union), playing the first 48 minutes of their match against the Newcastle Falcons. He also played two matches for Old Albanian during the 2014-2015 National League 1.
Blue Bulls
He signed a once-year contract with the Pretoria-based side.
