Du Preez enrolled at the Stellenbosch Rugby Academy, where he earned a spot in the Western Province Amateur side.
[2] In 2013, he represented his club side Durbanville-Bellville at the inaugural SARU Community Cup competition, helping them to win the Bowl Final, effectively finishing third.
He made seven appearances and scored two tries as he helped the side clinch the title.
[4] He made his first class debut on 9 March 2013, playing off the bench in a 17–17 draw against neighbours Boland Cavaliers.
[7] Du Preez also played some sevens rugby; in 2012, he was part of a Samurai Sevens side that won the 2012 7s Premier League in George and he was also a member of the Western Province side that played at the 2013 World Club 7s in London, in the inaugural edition of the competition.