Billy Horschel will go into the final day of the BMW Championship with a three-shot lead after carding a superb seven-under par on Saturday at the Cherry Hill Country Club in Denver.
His round of 63 included seven birdies, five of which were on the back nine, and managed a bogey-free 18 holes.
Fellow American Ryan Palmer is Horschel's nearest challenger as he sits on 10-under par after his round of 67 which consisted of six birdies and three bogeys.
Horschel is looking forward to playing the final round and hopes he will be lifting up the BMW Championship trophy come Sunday evening.
"It's going to be a fun day tomorrow. Obviously having a chance to win a golf tournament on the PGA Tour, especially during the FedEx Cup playoffs, can go a long way," Horschel said.
"We'll see what happens. If I can just keep doing what I'm doing and maybe I'll be holding a trophy on Sunday."
German US Open winner Martin Kaymer is tied in third with Masters champion Bubba Watson on eight under-par as they posted rounds of 64 and 66 respectively.
Kaymer had a slightly inconsistent round of eight birdies and two bogeys while Watson had a steady 18 holes with four birdies and and no bogeys.
Kaymer's European Ryder Cup teammates Sergio Garcia and Rory McIlroy suffered disappointing rounds as they slipped down the leaderboard.
Spain's Garcia had two successive bogeys on holes seven and eight but bounced back with a birdie at the 11th. But three further bogeys on the back nine resulted in him posting a two-over par 72 as the overnight leader stumbled. However, the 34-year old is still in contention as he remains seven shots behind Horschel on six-under par for tournament.
World number one McIlroy will need a miracle if he is to win another tournament as the Open and PGA Championship winner endured a disappointing third round.
The Northern Irishman had a nightmare on the green of the 12th hole as he four-putted from just four feet giving him a triple bogey on his way to a two-over par round.
McIlroy entered the tournament second in the FedEx Cup points list as he goes in search of the $10million (£6million) prize bonus.
The 25-year old attempted to see the funny side of his disastrous four-putt but hopes make amends during his final day.
"Glad everybody enjoyed my four-putt today," he tweeted. "Always tomorrow to get a few shots back and get up that leader board!"
Morgan Hoffmann claimed the best score of the day as he produced an eight-under par 62 to draw level with McIlroy in a share for 10th.
Rickie Fowler remains in contention as he posted a four-under par with American Ryder Cup teammates Jim Furyk and Jordan Spieth close behind in a tie for seventh.