Justin Thomas and Adam Scott are tied at the top of the Genesis Open leaderboard - but both failed to complete their second round in California.
Play was suspended at just before 5.30pm on Friday due to darkness with none of the 144 players able to complete 18 holes.
The overnight leader Jordan Spieth was not able to start his second round, which left Thomas and Scott to take the joint lead.
The American Thomas carded an opening 66 and had a five-birdie stretch bookended by bogeys on his way to five under for the day after 12 holes.
Scott went through 11 on five under, with the only blot on his book a bogey on the par-five 17th.
A number of players were not able to start their first round until day two at Pacific Palisades, with JB Holmes going round in 63 for the best score of the opening round.
Play will resume at 7am local time (3pm GMT), with Holmes currently in third - a shot behind the leading pair through nine holes - while Luke List is tied for fourth on seven under through 15.
Last week's Pebble Beach champion Phil Mickelson struggled with his form, failing to pick up a single shot for an opening 71, good enough for a share of 90th place.
Tiger Woods finished a round of 70 and is on par through 12 holes, having sunk a 44-foot putt for eagle on the par-5 first, but then bogeying the next two holes.
Rory McIlroy had a great day, producing four under through 12 to move to three under in total. Seamus Power was level par through 15 to stay one under overall.
