Wolfsberger AC was founded by Adolf Ptazcowsky, Karl Weber, Hermann Maierhofer, Franz Hafner and Michael Schlacher in 1931. They are not in any way affiliated with the Bundesliga team VfL Wolfsburg. After spending the first thirty-seven years of its existence on lower tiers of the Austrian league pyramid, the club eventually achieved promotion to the Austrian Regional League, which was on the second tier of the pyramid at that time, in 1968. WAC stayed at this level, with one exception during the 1977–78 season, for the next seventeen years, establishing themselves as a middle table side. At the end of the 1984–85 season, Wolfsberger AC eventually dropped back to the third level. The club returned for two further second-level appearances during the 1988–89 and 1990–91 seasons, but was immediately relegated each time. In 1994, the club was a founding member of the reactivated Regional League as the third tier of the pyramid. After being in the promotion race for the first few years in the new league, strength of the club gradually declined and eventually led to relegation at the end of the 2001–02 season. In 2007, WAC and local neighbours SK St. Andrä decided to enter a cooperation. While both clubs remained as separate entities, they closely worked together at almost all aspects: "Central areas of both clubs like administration, management, economy, marketing, gastronomy, as well as the athletic section as the core will be centrally administered from the newly created offices of WAC|ST.ANDRÄ at Wolfsberg." Since SK St. Andrä were playing at the Regional League, the corporation began at this level, from which it was promoted to the First League in 2010. At the end of the 2011–12 season, the cooperation secured promotion to the Bundesliga with one round of matches to go. Soon afterwards, the cooperation was dissolved; Wolfsberger AC thus competed as an independent club on the highest level of Austrian football for the first time in their history. After their first year in the highest class they came in 5th. After the season manager Nenad Bjelica left the club and became manager of FK Austria Wien, the champion of the 2012–13 season. Slobodan Grubor replaced him but after weak performances in the new season he was replaced by Dietmar Kühbauer. The team became known as 'RZ Pellets WAC' from the 2014–15 season, due to sponsorship. Wolfsberger AC qualified to the 2019–20 UEFA Europa League for first time in their history, after finishing third in the 2018–19 Austrian Football Bundesliga.
