Jason Dufner managed a one-under 69 on Saturday to retain the lead at the Byron Nelson Championship, but the rest of the leaderboard received a big shakeup.
Dufner, who earned his first PGA Tour victory three weeks ago in New Orleans, recorded a bogey and two birdies to stay in first place, which he grabbed during Friday's second round.
He is alone in first place at eight-under-par 202, one stroke ahead of three players.
"I feel good with where my game is at, what I'm doing out there, getting more comfortable playing in final groups and getting more comfortable trying to win these tournaments," Dufner said. "I think the more you do it the more comfortable you're going to be, and the more successful you are, it's going to carry over."
J.J. Henry and Jason Day fired three-under 67s to move into a share of second with Dicky Pride (69) at seven-under 203. Hall of Famer Vijay Singh posted a four-under 66 to rise into fifth at minus-six.
Pride was tied for second after Friday with Ryan Palmer, Chad Campbell, Pat Perez and Marc Leishman, but they all struggled during their third rounds in windy conditions.
Leishman carded a 71 to drop into a share of sixth with Jonas Blixt (67). Palmer, last year's runner up, and Perez both shot 72 and are now in a large group tied for eighth at minus-four. That group also includes defending champion Keegan Bradley (71).
Campbell, meanwhile, dropped to minus-three after posting a 73.
Dufner didn't have a ton of birdies on Saturday, but his success came in the form of steadiness.
He bogeyed the third hole, a par four, where he found a fairway bunker with his tee shot. But Dufner gained the stroke back at the sixth with a 10-footer, and parred his next seven holes to remain at seven-under.
He moved to minus-eight at the 14th, where his second shot landed 14 feet from the pin before he rolled in the birdie chance.
Dufner had a good birdie chance at the last. He hit his second past the hole, but spun it back, and the ball came to rest nine feet from the cup. Dufner wasn't able to sink the birdie, but tapped in for par to head into the clubhouse as the leader.
"It was a stress-free round for me," Dufner said. "I was in position a lot off the tee, which enabled me to be aggressive with iron shots and didn't have too many, you know, must-make par putts."
Earlier, Day -- the 2010 Byron Nelson winner -- had climbed up the leaderboard thanks to a handful of birdies.
He sank a 38-footer for birdie at the first, then left himself with two feet for birdie at the seventh before tapping in the putt. The Australian then added birdie putts at 10 and 16 to reach minus-eight.
The primary reason he isn't sharing the lead with Dufner is the bogey he carded at the last. Day actually reached the green in two and had eight feet for birdie.
But after missing that putt, he couldn't sink the three-foot par chance and had to tap in for bogey.
"The first putt wasn't the greatest, but the second was a decent putt, and I just hit it too hard through the break," Day said. "One day that hole will pay me back, and hopefully it's tomorrow."
Like Day, Pride also got to minus-eight. He birdied five and seven, but didn't make another during the remainder of his round and dropped a stroke at 12, where he twice found the rough and missed a lengthy par putt.
Henry was sitting at minus-three after stumbling to a bogey at No. 8, but he birdied four of his following eight holes to get to seven-under.
Singh, who won the tournament in 2003, pulled himself into contention with a strong final stretch. He was two-under for his round following a bogey at 14, but ran home a 38-foot eagle putt at the 16th.
At the next hole, a par three, Singh stuck his tee shot five feet from the cup and sank the birdie putt to get to seven-under for the championship. But he three-putted for bogey at the last to fall down the leaderboard.
NOTES: There was a second cut Saturday that fell at four-over, and eliminated eight players. Seventy-one players remain in the field...Phil Mickelson carded a 69 on Saturday and is tied for 21st at two-under.