Queenslander Cameron Smith has staged a superb late rally to share third place as American star Justin Thomas claimed his 11th PGA Tour title in South Korea.
Smith spent much of Sunday's final round sliding down the leaderboard as others charged but finished birdie, birdie, eagle in his last three holes to recoup the damage and post a closing three-under 69.
Inaugural champion Thomas staved off a challenge by Korean-born New Zealander Danny Lee to claim his second CJ Cup title in three years with a two-shot victory at Nine Bridges.
The overnight leaders were level for the first 13 holes before Thomas surged ahead with a birdie on the 14th, while Lee bogeyed the 15th and 16th to effectively drop out of contention.
Thomas eventually signed off with a five-under 67 for a winning total of 20-under 268, while Lee carded 69 to finish in second place.
"It was a very, very tough day," Thomas said.
"Danny made it extremely difficult. He really made a lot of putts, a lot of unbelievable up and downs to kind of keep me from getting all the momentum. I really, really played solidly today."
"My dad turned 60 last week, so maybe it's a little 60th birthday gift to him."
It has been a difficult week for Lee whose second child, originally due closer to Christmas, was born prematurely last Sunday and is in an incubator.
"Before I tee off my very first tee shot on Thursday, if someone's going to give me solo second, I would take it in a heartbeat. It is a good week but also very disappointing," he said.
"I really wanted to win the CJ Cup. It means a lot to me to win it in front of the Korean fans and all my Korean family but it is what it is. I gave my best out there today and solo second was the best I could do."
Hideki Matsuyama (65), Gary Woodland (66) and Smith (69) shared third place at 15-under.
A further three shots behind was Jordan Spieth, who returned 71. Next-best Australian Matt Jones tied for 20th after a 65, while Phil Mickelson finished with 68 to be joined by Jason Day (71) at seven-under.
The PGA Tour's three-event Asian swing now moves to Japan where Tiger Woods will compete in the Zozo Championship before Shanghai hosts the World Golf Championships from October 31.