Petersen took a year away from darts in 2013 to recuperate from an arm injury. In September he won the South African Masters by defeating Graham Filby 9–3 in the final and in doing so earned a place in his third World Championship for the 2014 edition, where he saw off Mohd Latif Sapup 4–1 in the preliminary round. Petersen danced onto the stage for his first round match against Steve Beaton which immediately got the crowd on his side as he defeated the 1996 BDO world champion 3–1 in sets. Petersen was 2–1 ahead against Justin Pipe in the next round and in the deciding leg of the fourth set he took out a crucial 130 finish with Pipe on 36, before wrapping up a 4–1 win. In the third round his run came to an end when he lost 4–0 to James Wade. Petersen partnered Filby in the World Cup of Darts and they came past Germany 5–3 in the first round, before Petersen beat Paul Lim 4–0 in his singles match in the second round. Filby lost his to Harith Lim, meaning a doubles match was needed to settle the tie which South Africa edged 4–3. In the quarter-finals they faced the number one seeds of Phil Taylor and Adrian Lewis, with Petersen and Filby both losing their singles matches to exit the tournament. Petersen was defeated in the final of the South African Qualifier for the 2015 World Championship 9–5 by Nolan Arendse.