Rose had a three-shot lead shrink to a single shot when he opened with three bogeys in five holes, and Jon Rahm made birdie on the par-five sixth.
Justin Rose held his nerve under pressure from Adam Scott to seal his 10th PGA Tour title in emphatic style with this sublime wedge to three feet at the final hole.
Rose, 38, has spent most of the past eight years among the top 20 in the world, a majority of that time in the top 10.
He won the 2013 U.S. Open and the Olympic gold medal at the 2016 Rio de Janeiro Games, but it wasn't until late in 2017 that he began his run of impressive consistency.
"So I felt like I had to work for this one today". And then he made a pair of 12-foot birdie putts early on the front nine, saved par with a 10-foot putt on No. 4 and hit it tight on No. 5 for another birdie.
Even when Scott tried to challenge Rose with four straight birdies to end the round, the victor answered with birdies of his own at 16 and 18.
U.S., Taliban Near Framework Agreement to End 18-Year Afghan War
It is exploring a full withdrawal of U.S. troops in return for a ceasefire and a commitment by the Taliban to these direct talks. The Taliban has so far refused to recognize the legitimacy of the US -backed government in Kabul, a major sticking point.
It was not all plain sailing, however, as Rose bogeyed three of his first five holes, before a run of three birdies in four holes from the seventh restored some order. He shot 72 and tied for fifth with Rory McIlroy (69) and defending champion Jason Day (67).
"I'm playing well and just need to keep producing", said Rose, whose 20 birdies the last few days are the most in the field.
Rose dedicated the win to his regular caddie Mark Fulcher, who is recovering after major surgery: "Fooch, that was for you, mate", added Rose.
Rose opened on Thursday with a 63 on the easier North Course and backed it up with a 66 on the South on Friday.
"I wasn't as sharp as I wanted to be (at start of the week) but each and every day I got a little better".
Overnight leader Jon Rahm of Spain headed a trio sharing third place on 134, while 14-time major victor Tiger Woods found himself 11 adrift after a sometimes frustrating two-under par 70.
"Got to have these little goals when I'm not in contention to win a tournament", Woods said. I know my putting will come around because (caddie) Joey (LaCava) and I were both struggling reading these things. After shooting an eyebrow-raising 65 on Thursday on the easier North Course, the three-time major victor closed with three consecutive 72s on the South Course. Teryn Schaefer presents the best social media posts from around the world of golf in "Good, Bad & Unusual" and after each day's play brings you the biggest talking points in "The Takeaway".