Pieters won the European Tour events D+D Real Czech Masters in 2015, KLM Open in 2015, and Made in Denmark in 2016. He finished tied for 30th at the 2016 The Open Championship and tied for 86th at the 2016 PGA Championship. Before 2017 Pieters had not competed as the Masters Tournament or U.S. Open. He represented Europe at the 2016 Ryder Cup and Belgium at the 2016 World Cup events.
