American Russell Henley shot a 5-under 67 on Saturday's moving day to take three-shot lead into the final round of The CJ Cup @ Shadow Creek in Las Vegas.
Henley sits at 15-under 201 overall after a bogey-free round.
Fellow American Lanto Griffin (66) shot up six spots on the leaderboard to sit in a four-way tie for second place at 12 under. Joining Henley at 12 under are second-round leader Xander Schauffele, who shot a disappointing 74, Talor Gooch (69) and Jason Kokrak (68).
Australia's Jason Day (66), Justin Thomas (68) and Tyrrell Hatton (73) sit T6 at 10 under, five strokes back.
Henley birdied three holes in a row on Nos. 10-12 to cap a clean card.
"I putted really well," Henley said. "Left myself in some good spots to make some birdies and had some really nice par saves and scrambled well. Did a lot of good things."
Schauffele bemoaned the pace of play -- "playing five hours and 40 minutes is kind of ridiculous in my mind" -- and his play in general. Schauffele carded two birdies against four bogeys.
"I was trying to figure out what was worse, I mean, yeah, whether the pace of play or my quality of golf. It was kind of a tie, I think, today," Schauffele said. "It was just a lot of bad breaks, kind of. Not to be like a sour person, but just one of those days. Today was my bad day for the week, got it out of the way before Sunday, which is nice."
Griffin followed an eagle on No. 7 and a birdie on No. 9 with four birdies on the back nine, a bogey on 18 his only blemish of the day. Griffin eagled the par-5, 542-yard 7th by sticking his second shot two yards from the pin.
"The putter saved me," Griffin said. "You know, I hit it all right there in the middle of the round, hit some good shots, but kind of the start and the end I struggled a little bit off the tee. But the irons feel good and the putter feels great. It was a fun day."
Bubba Watson (65) and Rory McIlroy (66) were the day's big movers, playing into tie for 10th with Columbia Sebastian Munoz and Japan's Hideki Matsuyama.
"Yeah, anybody can come at me," said Henley. "I mean, some 8 unders and 7 unders this week, and I shot 6 under the first day. You can go low out here, the greens are great and it's gettable, but you've got to play well to do that.
"I've got to just keep my head down and play a good round for me."
Collin Morikawa shot a third-round 71 to sit alone in ninth place at 9 under.
--Field Level Media