Justin Rose will head into the final round of the AT&T National with a four shot lead after posting a third successive sub-70 score in Pennsylvania on Saturday.
The Englishman, who followed up his opening 69 at the Aronimink Golf Club with a stunning six under par 64 on Friday, carded a three under 67 in his third round to stretch his one stroke overnight advantage.
Rose dropped only one shot - at the par three 14th - and finished the day ten under overall to sit four shots ahead of Sweden's Carl Pettersson (65) and South Korea's Charlie Wi (70).
American Jeff Overton was a stroke back after a 69 with compatriot Ryan Moore and Australia's Jason Day a further shot adrift in a tie for fifth.
Rose said: "I thought today was a really good round of golf in a lot of ways but more so how I felt out there.
"I really enjoyed the round.
"I obviously played solid for the most part. When I was in trouble, my short game really pulled me through. There were a couple times on the back nine I kept the momentum going.
"I thought the key moment of the day actually was a bogey I made on 14. I probably hit the wrong club there and I was in a wicked lie, long left.
"I tried to actually play safe to get it on the green, couldn't even hit the green and then got an even worse lie, managed to chop it to four feet and made the putt.
"That was probably the only little bit of emotion I showed all day with a fist pump, but it was for bogey.
"It was a good day. I really enjoyed the golf course again, and I think that's going to be my mindset for tomorrow - just to keep enjoying this place."
The 29 year old held a three shot lead going into the final round at the Travelers Championship in Connecticut last week but closed with a five over 75 to see his hopes of second US PGA Tour victory dashed.
"I think every week you're facing new challenges, new golf courses. That's what I'm enjoying at the moment," said Rose, who finally broke his US PGA Tour duck in early June by triumphing at the Memorial Tournament at Muirfield Village in Ohio.
"And I think what I'm doing well, which is what's putting me in this position, is I'm not carrying any baggage over from one week to the next.
"I didn't go into Hartford (last week) thinking, you just won, keep it going.
"And I didn't come into this week thinking, you've just blown a win.
"I'm just coming into each week seeing it as a new challenge and starting from hole one of the tournament."
"Although I'm on a great run, I'm not carrying that run with me mentally week to week.
"I'm quite into the challenge of each individual week at the moment, which is a nice mindset."
