Mickelson had a three-shot lead over Paul Casey with two holes to play when it was too dark too finish Sunday night because of delays from rain and a hail storm.
Although suspended play didn't last six months, as it did for Mickelson at Pebble in 1998, he had seemed frustrated at the decision to suspend play Sunday, with Casey arguing the other point. It's where his grandfather, Al Santos, was among the first caddies when the course opened in 1919, and Mickelson still uses as a marker the 1900 silver dollar his grandfather kept in his pocket to remind him he was not poor.
He matched the low score of the final round while playing in the last group, turning a three-shot deficit into a three-shot victory.
The European Tour remains in Australia this week for the third renewal of the ISPS Handa World Super 6 in Perth and the PGA Tour moves some 300 odd miles south along the California coast to Los Angeles for the Genesis Open at the magnificent Riviera Country Club. He has gone 28 years since his first PGA Tour victory and his 44th, and he joined Tiger Woods as the only players to surpass $90 million in career earnings.
Casey finished with a birdie that was worth US$152,000 (NZ$225,000) because he wound up alone in second place.More news: Ilhan Omar Says AIPAC Pays Politicians To Be Pro
He also won the Pro-Am with Don Colleran, the chief sales officer for FedEx.
With a victory, he would match Mark O'Meara's record of five victories in the storied Pebble Beach event, which dates back to 1937 when it was won by Sam Snead.
Mickelson said he could "see just fine" even after sunset, knowing darkness falls quickly on the Monterey Peninsula.
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.
The Pebble Beach Pro-Am appears headed for a Monday finish after a hailstorm halted play in the final round on Sunday.More news: Police release ‘disturbing’ video of woman being abducted in Miami
"I get where Paul is coming from", Mickelson said. In second is Scott Stallings, who sits at -15 and has finished his tournament.
Expanding on why he felt his performance at Pebble Beach boded well for Augusta, the three-time Masters victor said: "The two areas that you have to be at your best to play well at Augusta are you've got to hit the ball long and have a really good short game and those were two areas that were very helpful here".
It also would be his first victory on American soil since the Phoenix Open six years ago. It is where he began his professional career at the 1992 U.S. Open.
The four-time Pebble Beach victor nearly holed out from the ninth fairway to leave a tap-in birdie and complete a front-nine 33, before rolling in from 12 feet at the next to move into a share of the lead. And while the fairway lines already have been brought in to be much narrower than usual, the rough was light. Officials chose to complete play Monday, a decision that CBS's Gary McCord said had Mickelson "fuming". I would love nothing more than to add to it five months from now, but that's so far down the road.More news: Marcus Morris calls out Celtics teammates after embarrassing loss to Clippers