Paul Casey fired a seven-under 64 Friday to stroke lead with the second round of the Frys.com Open suspended due to darkness.
Casey finished 36 holes at eight-under-par 134.
Bud Cauley, who turned pro earlier this summer, posted a five-under 66 to move into second place at minus-seven. He was joined there by Ernie Els, who was five-under par through 16 holes of the second round.
There was a two-hour, 20-minute fog delay earlier Friday that pushed things back. The second round was eventually halted by darkness and it will resume Saturday at 10:30 a.m. (et).
Tiger Woods mixed six birdies with three bogeys in a round of three-under 68 on Friday. Woods moved to one-under-par 141 after two rounds.
In just his second round since missing the cut at the PGA Championship, Woods got going with a four-foot birdie putt on the 11th at CordeValle Golf Club.
Woods gave that stroke back on No. 13 as he went fairway bunker to greenside bunker and failed to save par from six feet out. He caught fire right after that though.
At the 14th, Woods poured in a 23-foot birdie effort and he came right back with an eight-foot birdie putt on 15. Woods made it three in a row as he tapped in a three-footer on No. 16 to move to minus-one.
Woods stumbled to consecutive bogeys at the 18th and first to slide back to plus-one. He sank a seven-foot birdie effort on the second to get one shot back. After six straight pars, Woods two-putted for birdie on the par-five ninth to end at minus-one.
"The number was 64 today. That was kind of the goal. I figured if I shot 64, I'd probably be between two and four back," Woods said. "That was kind of my mindset going out. I had it going early there, three in a row to get to three- under par for the day, and if we could just keep it going here, I could shoot my number. I made a couple mistakes there at 18 and one, but overall I'm still within seven shots of it right now."
Woods' 68 was his lowest round since he opened with a 68 at the WGC - Bridgestone Invitational and it was just his second sub-par round in his last seven rounds including the WGC and the PGA Championship.
Casey started with a birdie from off the green on the 11th. After a kick-in birdie on the 13th, he stumbled to a bogey on the 14th after finding a fairway bunker off the tee.
The Englishman tapped in for birdie on the par-five 15th to start a run of four consecutive birdies. He poured in a 37-footer at 16 and followed with a 24-foot birdie effort on No. 17.
Casey's run ended at the 18th, where he sank an 11-foot birdie chance to make the turn at six-under. He parred the first five holes of the front nine.
The 34-year-old rolled in a seven-foot birdie putt on the sixth and finished one clear of the field thanks to a 24-foot birdie effort at the ninth.
It has been a tough week for Casey. He won a tournament in Korea last week and has been fighting jet lag since getting to California.
"Yesterday, I think I actually played great golf, and the mistakes you saw and the bogeys I made really were myself, maybe a lack of concentration, a bit of fatigue," Casey stated. "And today was maybe an example of another day to get over that jet lag, and I eliminated those mistakes."
Garrett Willis, one of four first-round co-leaders, shot two-under 69 and is tied for fourth at six-under-par 136. He was joined there by Nathan Green, who was seven-under through 17 holes, and Troy Matteson, who was minus-three through 16 holes.
Billy Mayfair (66) shares seventh place with Rod Pampling (69), Chris Stroud (66) and Nate Smith (65). Briny Baird (one-under through 12) and Steven Bowditch (two-under through 10) are also at minus-five.
NOTES: Casey started the week No. 135 on the money list and is trying to get inside the top 125 to keep his tour card...His two-year exemption from winning the 2009 Houston Open runs out at the end of this season...The cut line looks like it will either be even-par or plus-one...If it ends at either number, that means David Duval, Shaun Micheel, Tommy Gainey and D.J. Trahan will be among those that miss the final two rounds.