Matt Kuchar shot his second 6-under-par 64 in as many days to secure the second-round lead in the weather-impacted Wyndham Championship on Saturday.
Kuchar will carry a one-stroke edge into the final scheduled day at Sedgefield Country Club, where second-round play was suspended by darkness with golfers still on the course.
Max Greyserman fired a 60 and is tied for second with Chad Ramey (64) and Cameron Young (62) at 11 under.
Golfers making the cut will be asked to play at least 36 holes Sunday in attempt to finish the 72-hole competition, which marks the final event of the PGA Tour's regular season, across three days.
"I know tomorrow's going to be a long one," Ramey said after finishing his round.
Kuchar hasn't won in five years. He tied for third place two weeks ago in the 3M Open, but he needs to win the Wyndham Championship to have a chance to make the FedExCup playoffs. He's the only golfer to participate in the playoffs in every year since the inception of that format in 2007.
Beau Hossler (70), Billy Horschel (68) and England's Aaron Rai (65) are at 10 under, while about a dozen other golfers will have to finish the second round Sunday.
"My record here has been really good over the last I would say six, seven years and I knew this course has been fairly kind to me," Horschel said. "As long as I didn't get too far ahead of myself with expectations or anything, I knew I was going to be hopefully have a chance to be in contention again and I'm right there with 36 to go."
Greyserman recorded the second 60 of the tournament after Hossler set the tone with his first-round score.
Sixty-six golfers finished the first round Saturday morning before a quick turnaround for the second round. Again, the start of play was delayed Saturday morning after more overnight rains drenched the course. The first round was postponed from Thursday and then there were delays Friday prior to the first tee shots.
Greyserman birdied the first five holes of the round and after six consecutive birdies cranked it up again. After four more birdies, he went to the final three holes needed to play those in a combined 2 under for a sub-60 score. His birdie on No 17 gave him a chance.
Greyserman, a 29-year-old who played collegiately about an hour away at Duke, has never won on the PGA Tour in 22 previous outings.
Ramey, who logged 22 holes Saturday, is trying to move into the top 70 for a spot in the FedExCup playoffs.
"I think that would obviously be everyone's goal out here," Ramey said. "If I could get a really great week in this week and sneak in there, it would be awesome."
Defending champion Lucas Glover posted a hole-in-one on the 189-yard 12th hole, but he ended the round with 71. At 1 over for the tournament, he won't make the cut. Glover managed just two birdies Saturday to go with the ace, which was his first since 2017.
Tour rookie Joe Highsmith also aced the 12th, giving him three aces this season. He became the first golfer to record three hole-in-ones in a season since 1983.
Also, Taiwan's C.T. Pan withdrew during the second round.