Brandt Snedeker was three-shots clear at the PGA Tour Wyndham Championship when the third round was suspended because of severe weather.
The American was 16 under for the tournament after seven holes on Saturday, at the final event of the regular season.
Brian Gay was 13 under through 12 holes, and Trey Mullinax, Keith Mitchell, C.T. Pan and D.A. Points were another stroke back at varying stages of their rounds.
Thirty players were still on the course when play was halted during the mid-afternoon with thunder booming and a threat of lightning.
After a delay of more than three hours, organisers chose to hold things up overnight and resume play at 8am on Sunday.
When things resume, Snedeker - who opened with a 59 at Sedgefield Country Club to become the first tour player this year and just the 10th to break 60 - will look to keep himself in position to contend for his ninth victory on tour and his first since 2016.
Spaniard Sergio Garcia is at 11 under after nine holes of round three in a tie for seventh.
Australians Cameron Percy (17 holes) and Aaron Baddeley (11 holes) are in a group tied for 35th at seven under.
Snedeker started the day off strong, rolling in a 60-foot chip for birdie on the par-4 second hole, then pushed his lead to three strokes with a birdie on No.5.
After he sank a short par putt on the seventh, thunder boomed and the horn sounded to stop play.
Gay was 12 holes into a second consecutive strong round when play was halted.
After shooting a 63 in the second round, he had four birdies and an eagle on Saturday.
