Haupt was born in Johannesburg, but attended St. Alban's College in nearby Pretoria. He was selected to represent the Pretoria-based on one occasions during his high school career – at the Under-18 Academy Week in 2007. After school, Haupt enrolled and played rugby for the University of Pretoria. He was included in their Varsity Cup squads from 2009 to 2012, but only made nine appearances during that time, of which only three were starts. He was also named in the squad in 2010, but to make any appearances for them.
Haupt was included in the squad for the 2013 Vodacom Cup and made his first class debut in March 2013, starting their 40–32 victory over. He also came on as a replacement against the a fortnight later in his only other senior appearance for the BlueBulls.
In May 2014, the George-based signed Haupt following a recommendation from national teamcoachHeyneke Meyer. He went straight into their first team for their 2014 Currie Cup qualification campaign, featuring in all six of their matches. He came on as a replacement in their first match of the season against the, making his debut in the Currie Cup competition and also scoring his first senior try within quarter of an hour of coming on. Haupt played off the bench to score another try in their 40–37 victory over the a week later and found himself promoted to the starting lineup against the. He scored a second try in their 33–31 victory over the as the SWD Eagles finished in fourth place to qualify for a place in the Currie Cup First Division. He started all five of their matches in the regular season to finish in third place and also started their 43–45 semi-final defeat to eventual champions the. Haupt appeared in the Vodacom Cup for the SWD Eagles for the first time in 2015, making three starts in the competition. The first of those saw him score a try against the, while his final appearance was in their quarter final match against a, where a 21–29 defeat saw the Eagleseliminated from the competition. A poor showing in the 2015 Currie Cup qualification series saw the SWD Eagles finish bottom of the log, with Haupt featuring in four of their six matches, of which they managed to win just one. An improved showing in the First Division saw the Eagles win four matches in a row during the regular season to secure a semi-final spot, with Haupt featuring in all five of their matches during the regular season, scoring a brace of tries against the in the final one of those as his side leapfrogged the into third spot. A 47–40 victory over the Griffons in the semi-final was followed by a 20–44 defeat to the in the final, with Haupt appearing as a replacement in both matches. He made six starts and three appearances as a replacement in the 2016 Currie Cup qualification series, in a prolific spell that saw him score five tries, in matches against, the, the, and the to finish third behind Mark Pretorius and Daniel Roberts on the SWD Eagles' try scorers list. The team again qualified to the First Division, and Haupt followed up a try against the with a brace against the, but it was not enough to see the team through to the semi-finals, finishing in fifth spot.
