Whitlock qualified from Group 5 of the Championship League and finished third in the Winners Group to reach the play-offs. He beat Jamie Caven 6–4, before losing 4–6 to Taylor in the final, having missed one dart to square the match at 5–5. He then won his second Players Championship of the year with a 6–2 defeat of Dennis Priestley in the final. At the Grand Slam of Darts, Whitlock won his opening two group games, but then lost 1–5 to Dean Winstanley to exit the tournament on leg difference. After all 33 ProTour events of 2012 had been played, Whitlock finished second on the Order of Merit to qualify for the Players Championship Finals where he beat Jamie Caven 6–3 in the first round. Whitlock then produced his highest ever televised average of 109.54 in a 10–1 win over Ronnie Baxter. He next won against Gary Anderson 10–8, but was then punished for hitting just 13% of his doubles against Phil Taylor in the semi-finals as he was heavily beaten 2–11. Nevertheless, following the tournament he moved up to 4th in the PDC Order of Merit, his highest position to date.