World Golf Championships-Cadillac Championship: Finished T8 (with bookend, 4-under 68s) at the World Golf Championships-Cadillac Championship in his attempt to become the first back-to-back winner at the TPC Blue Monster at Doral since Tiger Woods (2005-07). Was also hoping to join Woods as the only back-to-back winner of the Cadillac Championship (2002-03 and 2005-07).

Fort Worth Invitational: Won the Fort Worth Invitational by three strokes over Brooks Koepka for his second win of the season (Fort Worth Invitational, World Golf Championships-HSBC Champions). Moved to No. 2 in the FedExCup standings following the victory, matching the highest previous position of his career (spent one week at No. 2 following his win at The National in 2010). Matched his previous-best 72-hole score on the PGA TOUR (260/2017 Sony Open in Hawaii) and recorded the lowest 72-hole score on TOUR since the 2017 Wyndham Championship (Henrik Stenson/258). Became the fifth multiple winner of the season (Patton Kizzire, Justin Thomas, Bubba Watson, Jason Day, Justin Rose). Became the fifth international player since 2000 to win the event (Sergio Garcia/2001, Nick Price/2002, Rory Sabbatini/2007, Adam Scott/2014).