In 2014, he lost a playoff at his home event, the Austrian Open. However, he earned enough world ranking points to place 60th in the world and become the first Austrian to play in the U.S. Open. Wiesberger had the last guaranteed position for entry and it was the event immediately after the Austrian Open. At the 2014 PGA Championship, Wiesberger was one off the lead of Rory McIlroy after 54 holes at Valhalla Golf Club and was paired with McIlroy in the final round of the championship. However, Wiesberger shot a three-over par round on the final day and finished in a tie for 15th.