Pietersen entered Q School in an attempt to win a PDC Tour Card to play the full circuit in 2013 and 2014. He secured his Tour Card on the first day, beating Kevin McDine 6–5 in his final round match and hitting a nine-dart finish in the process. Pietersen represented South Africa in his first World Cup of Darts in February 2013 alongside Shawn Hogan and finished second in Group B to reach the last 16, where they faced the top seeds England, whose team consisted of the top two players in the world, Phil Taylor and Adrian Lewis. The South African duo took the match to a deciding leg, with Pietersen missing two darts for the match, before England hit double top to win 5–4. Pietersen failed to qualify for the 2013 UK Open as he finished 115th on the Order of Merit, outside of the top 96 who claimed their places. He lost in the semi-finals of the South African qualifier for the 2014 World Championship 8–5 to Devon Petersen and a year later Petersen was again the victor at the same stage, this time 8–2. Pietersen's tour status expired at the end of 2014 and he hasn't played in an event since losing to Petersen.