Patrick Cantlay, Graeme McDowell and Sam Saunders were level atop the leaderboard when the second round of the Genesis Open was suspended due to darkness, while Tiger Woods missed the cut.
Cantlay and McDowell completed their rounds to be one-shot clear on Friday, alongside Saunders, who was through 15 holes before play was halted at the Riviera Country Club, just like it was on Thursday.
Round two will resume at 07:15 local time in California on Saturday, with only 15 players unable to complete their second 18 holes.
Cantlay teed off tied for the lead alongside Tony Finau on Friday and the American managed to stay top, albeit with more company.
A two-under-par 69 consolidated Cantlay's position, while 2010 U.S. Open champion and Northern Irishman Graeme McDowell rose 16 positions thanks to a second-round 66.
Saunders also made it to seven under, though he still has three holes to play.
Ryan Moore (68) is outright fourth at six under, while overnight co-leader Finau posted a 71 to be a stroke further back.
Four-time major champion Rory McIlroy produced his best round of the tournament – a two-under-par 69.
The Northern Irish star, who opened with a 71, had five birdies to go with three bogeys in a mixed bag as he ended the day five shots off the pace – joined by Justin Thomas (71).
Former world number one and three-time major winner Jordan Spieth shot a 70 to be a shot behind McIlroy heading into Saturday's third round.
Spieth was fairly consistent with three birdies and two bogeys, though he was flawless on the front nine.
World number one Dustin Johnson bounced back from his forgettable opening round by posting a two-under-par 69.
After shooting a 74 on Thursday, Johnson climbed 53 places thanks to his almost bogey-free round which left the American star one over.
Woods, however, made an early exit from the event after recording a five-over-par 76.
Playing his second Tour tournament of the season having overcome back problems, 14-time major champion Woods holed eight bogeys in the second round as he said goodbye.
|Skoko backs former team-mate Dalic to take Croatia ´quite a way´ at World Cup|
|If Iceland go forward, we will go forward - Lada replaces longboat in Norse odyssey|
|Morata ´too expensive´ for Dortmund - Zorc|
|Hearn questions ´deluded´ Wilder´s desire for Joshua fight|
|Belgium game a ´perfect dress rehearsal´ for England, insists Carragher|
|World Cup permutations: How can Argentina qualify for last 16?|
|Bulldogs playmaker Foran out for season|
|RFU chairman offering no guarantees over Jones future|
|Algeria looking for new coach after parting ways with Madjer|
|Cahill still has something to offer Australia - Bosnich|
|Fear has discouraged Danes from travelling to Russia, says Sorensen|
|Reds rally to complete four-game sweep of Cubs|
|Arzani ready for Socceroos start against Peru – Skoko|
|Braves place closer Vizcaino on DL with right shoulder inflammation|
|West Indies hold slight edge against Sri Lanka|
|Don´t touch my Grizou – Pogba defends France team-mate|
|Yankees catcher Sanchez likely heading to DL|
|Messi is frustrated and hungry – Mascherano|
|Nainggolan the ´ninja´ Inter were missing, says Spalletti|
|Anthony fires back at Thunder fans unhappy he´s staying|
|MLS Review: New York City edge Toronto in Torrent´s first game|
|Watson shoots 63 to win Travelers for third victory of season|
|Iran contest not all about Ronaldo, insists Santos|
|Truex´s team use tricky strategy to win at Sonoma|
|World Cup 2018: England at home, Brazil´s party and exploding White Nights in St Petersburg|
|Pogba reveals ´issues´ with Mourinho|
|Mascherano plays down rumours of Sampaoli bust-up|
|Sweden winger Durmaz says racist abuse ´passed limit´|
|Morgan hails ´outstanding´ Buttler century|
|Paine to discuss ODI future after England whitewash|
|Cuper unsure of Egypt future as El Hadary nears milestone|
|Koepka ´shutting down´ until Carnoustie|
|Quintero and James plot Colombia´s way through uncharted territory|
|Federer upbeat despite shock Halle defeat|
|Journalists should round on Vettel - Verrstappen|
|Poland 0 Colombia 3: Falcao´s maiden World Cup goal revitalises Pekerman´s side|
|World Cup 2018: Cossack kids, Swan Lake and the Selecao in Rostov-on-Don|
|Maria takes maiden title in Mallorca|
|Hierro: I am 100 per cent the coach of Spain|
|Busquets recognises Iniesta´s burning ambition|
|Denmark v France: Tolisso hoping for second chance|
|Eight-try Wakefield hammer sorry Widnes|
|World Cup 2018: A panda, a tapir and a nightmare for Willy in Nizhny|
|Senegal´s Wague makes African history in World Cup|
|Cilic fights back to beat Djokovic in enthralling Queen´s final|
|Neymar and Suarez among players to send Messi birthday wishes|
|Strength of Senegal and Japan´s determination could trouble England and Belgium|
|Hamilton questions Vettel punishment after Bottas´ race ´destroyed´|
|Brilliant Buttler seals whitewash in Old Trafford thriller|
|World Cup 2018: An egg-and-spoon race, vodka and the Pogbas in Kazan|
|Queiroz tells his Iran players to follow the ´three Rs´ against Ronaldo and Portugal|
|Pizzi calm over Salah threat|
|Japan 2 Senegal 2: Honda gatecrashes Cisse´s party|
|Harden should be MVP ´hands down´, says World Peace|
|Southgate optimistic over Alli recovery for Belgium decider|
|Neymar´s tears no surprise to Fagner|
|Unhappy Renard continues ref rant|
|Wallace takes BMW International title despite Olesen 61|
|Hamilton cruises back to standings summit with France win|
|In-form Kvitova defends Birmingham title|
|Southgate responds to toughest England week in record-breaking style|
|Uruguay not thinking about Portugal or Spain, insists Cavani|
|Coric stuns Federer to claim title in Halle|
|England 6 Panama 1: Kane hat-trick sees Southgate´s side sail through|
|Australia v Peru: Juric keeping the faith as Socceroos chase unlikely last-16 spot|
|England surpass class of 1966 in Panama rout|
|Nigeria v Argentina: All eyes on Messi to rescue final World Cup chance|
|NSW seal Origin series with comeback win|
|World Cup 2018: Stalin´s bunker, a space museum and Serbian specials in Samara|
|Croatia looking out for number one - Lovren|