(CNN) -- Justin Rose leads at the halfway point of the AT&T National after a flawless second round of 64 on Friday at the Aronimink Golf Club in Pennsylvania.
The 29-year-old finished the day on a seven-under total of 133, one stroke ahead of Australia's Jason Day and South Korea's Charlie Wi -- who also impressed on Friday with a five-under par round of 65.
Rose's round included four birdies on the back nine, the last of which came on the par three 17th hole where he sank a 30-foot putt to clinch the outright lead.
"I didn't go out with the intention of going low, so to speak. The round just evolved," Rose said, AFP reported.
The Englishman finished tied for ninth after leading for much of the Travelers Championship in Connecticut last weekend and is now well placed to make up for that disappointment.
"I turned up here Monday morning feeling like I was a better player than I was on Sunday, because you learn," Rose said, PGATour.com reported.
"My game doesn't go away overnight. You have an experience like that, and if you ask yourself the right questions and if you deal with it in the right way, you become better," Rose added, PGATour.com reported.
American Jeff Overton currently lies in a tie for fourth place with countryman Charley Hoffman who posted a second round 67.
A shot behind are eight players in a tie for sixth, including Australia's Robert Allenby who shot a second round 67.
Defending champion, Tiger Woods carded an even-par round of 70 to make the cut by one stroke, ten strokes behind Rose.
"No matter how good I drive it, the putts aren't going in," Woods said, AFP reported.
"I've just got to putt better. I drove the ball on a string the last two days and haven't gotten anything out of it," said a frustrated Woods, AFP reported.