Veteran left-hander Mickelson started his final round of the Pebble Beach Pro-Am on Sunday three shots off the lead but ended up sealing victory by as many strokes in a weather-delayed finale on Monday. Play was suspended for several hours and despite Phil Mickelson's best efforts of persuasion, 54-hole leader, Paul Casey, had - had enough and play was called for the day as darkness fell, with the final pair having just a couple of holes to play. Casey needed Mickelson to make a big blunder on the two closing holes, and there was little chance of that.
Mickelson briefly went three ahead after converting from eight feet at the 13th, before picking up a sixth birdie of the day at the par-five next to match Casey's 15-footer from the fringe.
He finished at 19-under 268, while Englishman Paul Casey (71) birdied the final hole for second place on 16-under.
Here is a look at the 14 PGA Tour golf wins by Mickelson in California in photos.
He also won the Pro-Am with Don Colleran, the chief sales officer for FedEx.
Mickelson argued that he could "see just fine" on Sunday evening, moments after sunset with two holes remaining.
Even as Mickelson strongly hinted at wanting to finish - at point suggesting they play the 17th and he could scoot ahead to get a ball in play on the 18th so at least he could finish - Casey stood his ground.
This will be the first of two events at this course this season as the U.S. Open will come back here in June for the 119th playing of that event.
The Pebble Beach Pro-Am appears headed for a Monday finish after a hailstorm halted play in the final round on Sunday.
Mickelson's longest putt for par was 4 feet.
Casey has a four-foot putt to save par on the 16th green when play resumes at 8am (4pm GMT) on Monday, while Stallings holds the clubhouse lead on 15 under after a six-under 66.
That also led him to enter this week's Genesis Open, which he had not planned to play, prior to defending a title at the WGC-Mexico Championship next week.
"We've got two tough holes left and I don't want to jump the gun and get past that", Mickelson said. The US Open remains the final piece missing for him to complete the career Grand Slam, though Lefty was quick to caution that this week had no bearing on this summer. He finished three shots behind Graeme McDowell in 2010, the last US Open at Pebble.
Pebble Beach was so soft that balls were plugging in the fairway when they landed. I would love nothing more than to add to it five months from now, but that's so far down the road.