[4] Van Rooyen made his first class debut during March 2012, coming on as a substitute in the Blue Bulls' 2012 Vodacom Cup clash against Griquas in Pretoria.

[7] Van Rooyen made no appearances for the remainder of 2012 or the first half of 2013, but returned to action for the Blue Bulls U21 side during the 2013 Under-21 Provincial Championship, which saw him score a brace of tries in two different matches (a 59–17 win against the Leopards U21 in Potchefstroom[8] and a 40–27 victory over the Free State XV in Pretoria)[9] and making a total of twelve starts.

Van Rooyen returned to first class action during the 2014 Vodacom Cup as he played in the final few minutes of the Blue Bulls' match against the Falcons.

Despite that being his only involvement in the first team, Griquas announced at the start of October that Van Rooyen signed a contract extension to remain in Kimberley for the 2015 season.

[14] A few days later, he also got his first opportunity to play in the Premier Division of the Currie Cup, coming on as a late substitute in their final match of the season against his former side, the Blue Bulls in a 46–12 defeat.