In-form Brendon Todd surged into a two-shot lead at the RSM Classic in Georgia to leave himself within sight of a third consecutive PGA Tour victory.
Todd, who won last week's Mayakoba Classic in Mexico after a victory in Bermuda earlier this month, carded a superb eight-under-par 62 at Sea Island's Seaside Course on Saturday to lead by two strokes heading into Sunday's final round.
The American journeyman, whose only other win on the PGA Tour before this year was a victory at the 2014 Byron Nelson Championship, had started Saturday's third round tied for seventh.
But the 34-year-old from Pittsburgh produced a scintillating charge over the front nine to quickly advance through the field, notching four birdies in his opening five holes to move to four under.
A monster 28-foot birdie putt on the par-five seventh hole took him to five under, and a sixth birdie on the ninth saw him reach the turn at six under for the day.
Further birdies on the 11th and 17th left him on 18 under through 54 holes, two shots clear of Webb Simpson, who also impressed with a seven-under-par 63, and Colombia's Sebastian Munoz.
"Like my caddie said, it was a video game out there today," said Todd.
"Just thrilled with the way I'm hitting it and feeling out there. I putted unbelievably well and thought they were all going in."
"I'm really happy for him."