Greenkeepers had to clear hailstones on Pebble Beach during the last final of Sunday
Phil Mickelson led the AT & T Pebble Beach Pro-Am with two shots with two holes to play after the last round was suspended due to fading light.
The American is at the age of 18 with two holes to play, with playmate Paul Casey at 15 years.
With slight fading, Mickelson wanted to end the round and said, "I'm fine," but England Casey chose not to draw on the 16th.
"I get exactly where Paul comes from," Mickelson said later.
"It is dark and we have the chance to come out on Monday fresh greens. I have a pretty good vision, I play well and I wanted to continue."
The beginning of the game of the day was delayed for one hour for rain and stopped again for two hours as a hailstorm the California course.
American Scott Stallings holds the club house ahead of 15 under after h is six-under-par 66, with Jason Day finishing at 13 below, on par with South Korea's Kim Si-woo.
& nightly leader Casey had a triple advantage over Mickelson at the start of the day, but the five-time winner lost three birdies in the front nine and three more after turn.
"There is still a glimpse," Casey said about his chances, which was equal to his round when the game was suspended. "I have to do something special."
Phil Mickelson came closer to a fifth win at AT & T Pebble Beach Pro-Am in California when the game was suspended due to the darkness.
The American, who started the last round on Pebble Beach with three shots back, ended with a triple lead with two more holes to play.
After a rain-delayed start, Mickelson had produced a blemish round and holes six birdies to go down to 18 before the game was canceled.
Third-round leader Paul Casey, who mixed two bogeys with two birdies, was on 15 under with three more holes, connected to Scott Stallings who finished with a 66.
The Australian Jason Day and Si Woo Kim, from South Korea, were in the clubhouse on June 13th.
Shot Russell Knox closed at nine o'clock after a fourth-round level-par 72, a shot free of Northern Irish Graeme McDowell.