Australia's Cameron Percy fired a nine-under 62 on Friday to move atop the leaderboard after two rounds of the BMW Charity Pro-Am.
Percy finished 36 holes at 13-under 130.
The tournament is staged on three South Carolina courses, which each person in the field will play once over the first three rounds. The host course -- Thornblade Club -- will be used for the final round.
Because Thornblade is a par-71 course and the other two -- The Carolina Country Club and Greenville Country Club -- are par 72s, scores vary in relation to par.
Percy played Thornblade on Friday.
First-round leader Darron Stiles shot a three-under 68 Friday at Thornblade and is tied for second place with Reid Edstrom and Aaron Watkins. Edstrom and Watkins had six-under 66s in round two at The Carolina Country Club. The trio is 11-under par, but Stiles has taken 132 strokes compared to the 133 for Edstrom and Watkins.
Gene Sauers (66), Brent Delahoussaye (67), Robert Streb (68) and Andy Pope (68) are knotted in fifth place at nine-under 134.
Percy parred his first four holes on Friday, then closed his front nine with birdies at the fifth, seventh and ninth. He was seven-under par for the championship, but the best was yet to come for Percy.
He birdied the 10th, but tallied five birdies in a six-hole span from the 12th to get to 13-under par. Percy parred the last to miss the course record by a stroke.
"It was about as good as I can hit it," Percy said. "I missed a few putts early or else it could have been something crazy. It was just one of those days where I seemed to have the perfect yardage all day. Every number was perfect. That's how you shoot nine-under."
Jim Renner, Brad Fritsch, Camilo Benedetti and James Hahn are tied for ninth at minus-eight.
NOTES: Percy is looking for his first Nationwide Tour win, but has five victories in his native Australia...The cut will come after Saturday's third round.