A closing 66 saw the world number three finish the weekend on 15 under par alongside Bill Haas.
Hideki Matsuyama finished 23 under par and seven shots clear to become the first Japanese player to win a World Golf Championships title.
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Shane Lowry hit double bogeys on the eighth, ninth and 11th holes to sign off the weekend on 4 under par after a final round of 77.
Meanwhile, Seamus Power is still in contention ahead of the final round at the Sanderson Farms Championship in the States.
The Waterford man, who represented Ireland at the Rio Olympics, is 12 under par after a third round 70.
Luke List and Chris Kirk share the lead on 14 under par.
