American pair Heath Slocum and Scott Langley share the halfway lead at the Wyndham Championship at Sedgefield Country Club in Greensboro, North Carolina.
Both players followed up their five-under 65s in the opening round with exactly the same score on Friday to move to the top of the leaderboard overall by a single shot.
Padraig Harrington shot consecutive 72s and missed the cut by six shots and finished his PGA season in 188th place, which sees the Dubliner miss out on the season-ending FedExCup.
Slocum was just one-under for the day at the start of the 13th but a run of four successive birdies helped him finish with a flourish.
"I came into this week trying to create a little bit of momentum," Slocum said.
Speaking about his run on the back nine to the PGA Tour website he said: "It was a good stretch, and obviously at this point, you're going to need a lot.
"You're going to have to have some of that to keep yourself in contention and go for it."
Langley would have claimed the outright lead, after six birdies, including three on the trot from the 14th, had he not made his only blemish on the 406-yard, par-four 17th.
Scotland's Martin Laird is among four players, alongside American trio Brian Stuard, Nick Watney and Andrew Svoboda, to sit in joint third after following up his 65 on Thursday with a 66 in the seocnd round.
In an entertaining round, Laird made seven birdies and three bogeys.
Colombian Camilo Villegas, the overnight leader, is a shot further back alongside eight others after his 69, while Ryo Ishikawa is also on eight-under for the tournament after a sparkling 62 that was only one shot off the course record.