In position now for his first career victory, Weekley is 12-under-par 204 through 54 holes.
Weekly claimed his third round was a struggle, yet still hit 11-of-14 fairways at Pete Dye Golf Club. He was less successful finding the greens -- hitting just 12-of-18 -- but made up for that once he was on the surface.
'I didn't hit it real well, but I putted pretty good,' said Weekley, 33. 'I had some pretty good up and downs.'
His round included four birdies and two bogeys, with both of the bogeys coming on the front nine. Although he has never won, Weekley has held at least a share of the 54-hole lead two other times this season.
At the Chattanooga Classic in June, he finished tied for third. At the Price Cutter Charity Championship last month, he tumbled into a tie for fifth.
'When it is my time, it is going to happen,' defended Weekley, who currently ranks 26th on the money list. 'I'm a firm believer in what goes around comes around. I feel like I belong on the PGA TOUR.'
Weekley, who owns a top-20 finish on the PGA TOUR, has at least proven he can challenge on the Nationwide Tour.
In his last 10 starts, he has five top-10 finishes. In his last 39 rounds, he has played 34 at par or better.
'I reckon I'm concentrating more on the golf course,' Weekley said. 'I'm just staying calm out there. My caddie is always thinking positive, and that helps. I tend to get negative.'
Among the players who sit two shots behind Weekley is Jason Enloe, who carded a 6-under 66 to get to 10-under 206. Enloe closed his round with a bogey-free 32 on the back nine -- this after bogeying two holes on the front.
'I've been missing cuts, but this tour is so competitive you can play well and miss the cut,' said Enloe, who is 149th on the money list. 'I'm sure I'll be nervous tomorrow. It's been a long time since I've been in this position.'
Jason Allred shot a 67 and Rich Barcelo had a 68 to join Enloe at minus-10.
Bradley Hughes (67), Erik Compton (66) and Jamie Broce (68) share fifth place at 9-under 207 -- one shot ahead of seven players who are tied for eighth.