(CNN) -- Nick Watney birdied two of the final three holes to win the Buick Invitational by one shot from John Rollins at Torrey Pines for his second career Tour title.
Nick Watney birdied two of the final three holes to clinch his second career title at Torrey Pines.
The pair were level teeing off on the par-5 18th after Rollins, seeking his first success since 2006, let slip a three-stroke overnight advantage.
Watney, who was three down with five to play, sealed victory after rolling his first putt from 63 feet to within three feet and finished on 11-under-par following a four-under 68.
Rollins missed a 12-footer that would have sent the duo into extra time, ending with a two-over 74 despite an eagle on the 13th.
Camilo Villegas finished tied for third at nine-under along with Lucas Glover, who closed with a 68.
"I knew with this golf course and the conditions it was going to play tough," said Watney who sank a 39-foot putt on 16 for birdie.
"John and Camilo were both playing well all week, so I really just tried to be patient and give myself as many opportunities as I could and luckily I was able to make some putts, and it worked out."
While Watney carded just one bogey -- at the seventh -- Rollins dropped shots on the opening two holes of his final round and also had bogeys at 12, 14 and 16.
"It was tough out there today. Nick played great, hit the ball well all day, made some good putts, and my hat's off to him," Rollins said.
"A four-under is a great score out there today. I just seemed to kind of struggle to get anything going ... kind of gave the guys a little bit of life."
Luke Donald started the final round level in fourth but was undone by a 73 to finish five under and share seventh place with Bubba Watson, Ben Crane and Charley Hoffman.
Padraig Harrington, the 2008 Open champion, had a good last round with a 68 to finish tied for 24th on one under.