Career
Youth and Varsity rugby He played for the Boland Cavaliers in youth competitions and was part of the 2009 Vodacom Cup squad, without making a senior appearance. He then moved to Potchefstroom in 2010, where he played four matches for the Northwestern University Pukke in the 2010 Varsity Cup competition. He also played for the Leopards U21 team during the 2010 Under-21 competition.
Leopards Kings He remained with them for three seasons, making 36 appearances for them in the and Vodacom Cup competitions in 2011 and 2012.
In 2013, he was also named in the Kings squad for the 2013 Super Rugby season. He made his Super Rugby debut for the Kings in their first ever Super Rugby match, a 22–10 victory over Australian side the Force in Portuguese Elizabeth.
After starting the first three matches of the season, he missed the next seven due to a knee injury. He returned to make a further five appearances, as well as playing in both legs of the Kings" Super Rugby promotion/relegation play-offs against the Lions, which saw the Kings lose their Super Rugby status.
Sharks He made his debut in their second match of the season against the Golden Lions and immediately established himself as their first-choice full-back, starting all the remaining games of the season, scoring four tries.
He was included in the Sharks squad for the 2014 Super Rugby season and made his Sharks Super Rugby debut in a 31–16 victory against the Bulls in Durban. Return to Kings At the end of 2015, Marais was one of a number of players that joined the Southern Kings prior to their return to Super Rugby for the 2016 season. However, the Eastern Province Kings – the provincial union that was supposed to administer the Super Rugby team – suffered serious financial problems and the South African Rugby Union stepped in to assist the Super Rugby franchise.
However, Marais was not one of the players contracted by SARU to represent the Southern Kings.
After being unpaid for several months, he was one of eighteen players involved in submitting an application to get Eastern Province Rugby liquidated in an attempt to recoup unpaid salary payments. Bulls Shortly after the 2016 Super Rugby season kicked off, Marais joined the Pretoria-based Bulls on a two-month trial basis.