MADISON, Mississippi, July 21, 2012 (AFP) - Stallings shot to the top of the leaderboard after four birdies and an eagle in his first eight holes and had an 18-under total through 10 holes of the third round at Annandale Golf Club.
Inclement weather has been a problem every day, including a delay of more than three hours on Saturday.
When the third round resumes on Sunday morning, Stallings will be chasing a second US PGA Tour title.
He claimed his first victory at the Greenbrier Classic as a rookie last season, but has battled rib and back injuries this year.
"I'm just happy to be playing," Stallings said. "All the birdies and stuff are great, but at the end of the day, just to be out here and be competitive -- that's all I'm really focused on."
After birdies at the third and fourth, Stallings rolled in a 40-foot eagle putt at the par-five fifth hole then nabbed back-to-back birdies at seven and eight.
Heath Slocum, Billy Horschel and Jason Bohn were all at 14-under. Slocum had seven birdies and one bogey in his first 13 holes.
Horschel and Bohn were both through nine holes, having shared a one-shot lead when the second round wrapped up earlier on Saturday.
Horschel was leading the tournament after finishing his second round on Friday, but due to the bad weather Bohn had to come back with almost half the field the next morning to reach the 36-hole mark.
Of the handful of players who finished the third round on Saturday, William McGirt posted an eight-under 64 for the lowest score in the clubhouse of 13-under 203.