Youth Du Plessis played for the at the 2008 Under-18 Academy Week competition before moving to
Durban to join the . He played for the team in the 2009 Under-19 Provincial Championship and for the team in the
2010 Under-21 Provincial Championship, scoring 96 points in twelve matches. He was named in the Sharks' squad for the
2011 Vodacom Cup competition, but failed to make an appearance. He made two more appearances for the Sharks in the
2011 Under-21 Provincial Championship, before returning to the team for the latter part of the competition, making a further four appearances.
Blue Bulls Du Plessis was included in the squad for the
2012 Vodacom Cup competition and made his first class debut against the , coming on as a half-time substitute and scoring a try within five minutes of his debut, as well as two conversions. He also appeared as a substitute in two of their remaining fixtures in the competition. He was once again included in their squad for the
2013 Vodacom Cup competition and made his first start for the Blue Bulls, once again against the , this time scoring seven conversions. Du Plessis's next game in the competition came against the , with the running out 110–0 victors. Du Plessis weighed in with two tries and fifteen conversions (missing just one attempt), scoring 40 points in one match, a
Vodacom Cup record.
Free State Cheetahs Du Plessis joined the on a short-term deal for the
2013 Currie Cup Premier Division.
Golden Lions Du Plessis signed a two-year deal with the , joining them in November 2013. signing a contract until the end of 2016.
Toulon In August 2015, Du Plessis joined French
Top 14 side as a medical joker on a three-month loan deal.
Bayonne Du Plessis joined in November 2015 as a medical joker, before signing a full-time contract a month later, signing a three-year deal starting in the 2016–17 season.
Varsity Cup Du Plessis also played
Varsity Cup rugby for , making twelve appearances in
2012 and
2013. ==References==