The PGA Tour's regular-season finale was halted on Friday afternoon with lightning in the area of the Sedgefield Country Club.

The weather moved in as Australia's Adam Scott slipped down the leader board, likely dashing his chances of reaching the FedEx Cup playoffs.

The round will resume on Saturday morning.

Young and Rai were among those still on the course when play was called. 

Young had just birdied 14 and 15 to get to seven-under for the round and 14 under for the tournament. 

Rai, from England, had six birdies through 13 holes completed.

South Korea's Im Sung-jae shot 64 for the second straight day and shares the clubhouse lead with Mac Meissner at 12-under. Meissner fired a seven-under 63 to climb the leaderboard.

Mark Hubbard is alone in fifth at 11-under following a 66.

After a strong first round, when he was just four shots off the lead, Scott fell back into a tie for 41st.

He was one-over for the second round through 14 holes, to leave him four-under for the tournament. 

The 45-year-old fired two birdies in a bright start to the front nine, but matched that with two bogeys.

A double-bogey six at the 10th had him on the back foot before he scrambled a birdie at the 13th.

Unless he can pull off something extraordinary, Scott will miss out on securing a spot in the playoffs starting next week.

The Aussie needed to finish with a two-way tie for third or better to have a reason to fly to Memphis, something which was likely to require shooting 20-under in Greensboro.

Meanwhile, fellow Australian Karl Vilips shot a three-under 67 in his completed second round to be tied for 22nd and six-under for tournament.

Joel Dahmen, the first-round leader thanks to a white-hot 61, was even par through 10 holes on Friday to remain at nine under.