In 2012, Priestley qualified for the 2012 UK Open, where he lost in the fifth round to eventual winner Robert Thornton. He also qualified for his first European Tour Event, the Dutch Darts Masters, and was beaten 3–6 by Andy Smith in the first round. In November, Priestley reached the final of the Players Championship 17 in Crawley, where he was beaten 2–6 by Simon Whitlock, having defeated an in-form Michael van Gerwen 6–1 in the semi-finals, despite his opponent averaging 105. His run to the final and successive quarter-final defeats in the last two events secured his qualification for the World Championship in December through the ProTour Order of Merit. He played Ronnie Baxter in the first round and lost 1–3.