American Bubba Watson held off late charges by Phil Mickelson and Venezuela's Jhonattan Vegas to clinch his second PGA Tour title with an emotional one-shot win at the Farmers Insurance Open in San Diego.
Left-hander Watson coolly birdied the par-five last to keep his challengers at bay as he closed with a sparkling five-under-par 67 on the tricky South Course at Torrey Pines.
The long-hitting 32-year-old, a stroke off the pace going into the final round, got up and down from a greenside bunker at the 18th, by sinking a curling 12-footer before pumping his right fist in celebration.
Three-time champion Mickelson had a chance to force a playoff by holing a wedge shot from 72 yards out but his ball ended up four feet from the pin to set up a closing birdie.
"It means a lot," said a tearful Watson, whose father Gerry died last year after a lengthy battle with lung cancer. "My dad is not here. Mum, I love you."
Asked if his breakthrough win at last year's Travelers Championship had helped him at Torrey Pines, Watson replied: "No. It's hard every time."