Petersen was included in the squad for the 2013 IRB Junior World Championship,[5] but failed to recover from a hamstring injury in time and was replaced by Jesse Kriel.

[16] Petersen only made his debut for provincial side the Eastern Province Kings after eight Super Rugby appearances, coming on as a substitute in their 37–21 2013 Currie Cup First Division victory over the Griffons in Welkom.

[18] In 2014, Petersen made two appearances for the Eastern Province Kings during the 2014 Vodacom Cup competition and scored a try in their match against the Sharks XV.

[19] Upon his return from international duty at the 2014 IRB Junior World Championship, he was included in their squad for the 2014 Currie Cup Premier Division season.

[20] In July 2014, it was widely reported that Petersen signed a contract to play for the Cheetahs during the 2015 Super Rugby season, while still being available for the Eastern Province Kings during the 2015 Currie Cup Premier Division.

[21][22] However, Kings CEO Charl Crous said that, while they would assist their players in gaining Super Rugby experience, no deal was in place with the Cheetahs for a Petersen loan for 2015.