Canonsburg, PA – Whee Kim carded a 6-under 65 on Friday to jump into the top spot of the Mylan Classic.
Kim, who had missed five of his last six cuts entering this event, finished two rounds at Southpointe Golf Club at 11-under-par 131.
Ben Martin (67) owns second at 9-under, while Cliff Kresge (67) sits in third at 8-under 134.
Nick Rousey (65), Kevin Kim (67), I J Jang (67) and Guy Boros (69) occupied fourth at minus-7.
First-round leader Zack Sucher managed an even-par 71 during his second round to drop into a share of eighth place with Steve Wheatcroft (70) and Brad Elder (68) at 6-under.
Blayne Barber had shot a 66 to move into a share of second place with Martin, but was disqualified after his round for signing for an incorrect scorecard. He signed for a birdie on the par-4 16th when he actually recorded a par.
The 23-year-old notified tournament officials of the difference after checking his score online when he left the media center.
"I looked over it and I just didn't see it," Barber said about his mistake. "Somehow I missed it. He (walking scorer) missed it. We all missed it. It's unfortunate because it could have been corrected."
Whee Kim opened with a trio of pars before reeling off three straight birdies from the fourth to move to 8-under.
He made the turn at 9-under following a birdie at the ninth, and then recorded back-to-back gains at the 11th and 12th to reach 11-under.
The 21-year old rookie parred his final six holes to stay there and grab the lead heading into the weekend.
"I like windy days and a slopey course," said Whee Kim. "I have a lot of experience playing on courses similar in Korea. All of the courses are on mountains and are very windy. I have confidence on this course. I thought this course is very good for all Korean golfers."
Martin played his first four holes at even par after recording birdies at the first and fourth around a pair of bogeys at the second and third.
After parring his next four holes, he birdied the ninth to move to 6-under.
Martin pulled within a stroke of the lead with a run of four straight birdies from the 12th, but a bogey at the 16th halted the run and he closed with a par to finish at 9-under.
"It was a really good day other than my speed on some of those putts," stated Martin. "I don't think I've three-putted in weeks and to have three in one round is abnormal. It's a little bit disappointing. Those are shots that you throw away. It's not like I'm putting bad, I just had some speed issues."
Kresge started on the back nine and ran off five straight birdies from the 13th to quickly move to 9-under, but he would play his next 10 holes at 1-over after countering birdies at the first and eighth with bogeys at the 18th, second and fifth.
NOTES: The cut line was set at 1-over-par 143, with 67 players advancing to the weekend ... Due to possible thunderstorms in the area on Saturday, the third round will be played in the threesomes off split tees ... Philippe Gasnier, Brian Prouty and Reid Edstrom all withdrew during the second round ... Kim's 11-under is his best 36-hole score this year.