Sergio Garcia shot a four-under 66 on Saturday to take the lead at 14-under 196 after three rounds at the PGA Tour's Wyndham Championship.
Tim Clark and Bud Cauley were a stroke back, with Jason Dufner, Harris English and Carl Pettersson at 12-under.
Dufner shot a 63, Cauley had a 66, Clark a 67, and English and Pettersson 68s.
Garcia - whose second-round 63 marked his best PGA Tour round in a decade - made a move with consecutive birdies midway through the back nine that briefly helped him leapfrog his playing partner, Clark.
Clark might have had the lead comfortably to himself, had he not missed short birdie putts on consecutive holes midway through the back nine.
Instead, he'll have to settle for a share of second place with Cauley, who had three straight late birdies.
Rod Pampling remains the best placed Australia shooting an even-par third round 70 to be six-under, eight shots behind Garcia in a share of 33rd place.
Webb Simpson started one stroke back and a short while after his birdie on the par-5 No.5 - the easiest, and most frequently eagled, hole on the course this week - was part of a six-man logjam that shared the lead at 12-under.
Joining him were English, Clark, Garcia, Pettersson and second-round leader Jimmy Walker.
English was the first to backslide with a bogey on No.11. Walker fell off the pace with a bogey on No.10.
Simpson ran into big trouble late in his round with consecutive bogeys, sending his tee shot on No. 15 into some deep rough and then three-putting on No.16, and his 71 dropped him four strokes back.
Dufner finished strong with birdies on three of his final four holes to sneak up the leaderboard.
"Kind of what I needed to get back in this tournament, post a low score and kind of be in the mix tomorrow," Dufner said.
Justin Leonard, who shot a 64, was one of the biggest movers. He started at four-under and used a steady stream of birdies to make his climb. He needs a high finish to earn enough points to qualify for the playoffs, which begin next week at The Barclays.
"I know I need a top-three, top-four finish and ... I certainly gave myself a better chance," Leonard said.
Jeff Overton had the first hole-in-one of the week - and his first on the tour - on No. 12, using a 6 iron to ace the 235-yard hole. After finishing his round, he Tweeted: "What a sweet shot. Too bad I didn't win a car."