GREENSBORO, N.C. — Si Woo Kim and Lucas Glover had putts for 59 on another low-scoring day in the Wyndham Championship.
Kim's 50-foot birdie try on his final hole — the par-4 ninth — slid by the right edge Friday, leaving the 21-year-old South Korean player with a tournament-record 10-under 60 and a two-stroke lead.
Glover shot 61, missing a 6-foot birdie putt on the par-4 17th and three-putting the par-4 18th for bogey in the PGA Tour's regular-season finale.
"I kind of lost of concentration a little bit, got eat up in the moment and kind of just wasn't focused," Glover said about the par miss on 18. "My fault, stupid, but it happens."
They missed chances to become the second player this month to break 60 on the PGA Tour.
Jim Furyk, tied for second with Glover and two others, shot the first 58 in PGA Tour history Aug. 7 in the final round of the Travelers Championship. Six players, including Furyk, have shot 59.
Kim drove into the left rough on the par-4 18th, costing himself a clean shot at the front pin position.
"Tee shot aggressive," Kim said. "Yesterday, hit 3-wood, but today just try to hit driver. Hit driver and then missed left. Just tough, tough lie and ... tough pin. I'm trying before like 10 yards, 15 yards landing, but almost hit the green landing. Putting, really fast down grain and just trying to par, but almost close there."
Kim eagled the par-5 fifth, hitting a 347-yard drive and a 170-yard approach to 10 feet. He made the last of his 10 birdies on the par-4 eighth, holing another 10-footer. Kim played his opening nine in 6-under 29, and also birdied the par-4 second — making another 10-footer.
"My irons and putting game is much better," Kim said. "Much more putting practice last week."
After making three bogeys in an opening 68, Kim had a 12-under 128 total to take the two shot advantage over Furyk, Lucas Glover, Kevin Na and Japan's Hideki Matsuyama into the weekend.
"Not so much celebrate today," Kim said. "After this week, play good, I celebrate. Just trying rest today and then to see dinner."
Kim's previous best on the PGA Tour was a final-round 63 last month in a playoff loss to Aaron Baddeley last month in Alabama in the Barbasol Championship.
Furyk had a 64, birdieing four in a row on Nos. 13-16.
"I'm a little surprised how low the scoring is," Furyk said. "The fairways are pretty firm. They're extremely quick, have a lot of slope in them. If you get the ball in the fairway, it's playing short, the ball is rolling. I can see guys hitting lot of wedges. I'm still shocked we had so many guys going that low."
Glover birdied Nos. 11 and 13-16 He's coming off a seven-week break.
"Five weeks of playing. Little golfed out," Glover said. "Wanted some family time and took some family time and just had a situation with my father-in-law couple weeks ago, so withdrew from Hartford. He's doing better, so here we are."
Matsuyama shot a 64.
Na, tied for the first-round lead with Spain's Rafa Cabrera Bello at 63, had a 67.
"I'm in good position for the weekend," Na said. "Keep attacking those flags and we'll see."
Cabrera Bello was three strokes back at 9 under after a 68.
"I felt I played good for the majority of the round, just the putts didn't want to drop in," said Cabrera Bello, fifth last week in the Rio Olympics.
U.S. Olympian Rickie Fowler was tied for 11th at 6 under after his second 67.
Patrick Reed was 3 under after a 71. He won the 2013 event for his first tour title.
Davis Love III, the tournament winner last year at age 51, is sidelined following hip surgery.
The top 125 in the FedEx Cup standings will qualify for The Barclays next week at Bethpage Black. It the next-to-last chance to earn Ryder Cup points, with the top eight players determined after The Barclays.
Love will make his first three captain's picks Sept. 11 after the BMW Championship. The final pick comes two weeks later after the Tour Championship.