The 28-year-old leads Harris English and PGA Tour rookie Will Wilcox by a single shot after picking up a birdie on his last hole and he feels he got a better rub of the green following Friday's disappointing round of 69.
He told pgatour.com: "Maybe there were a few good breaks for me and on holes where I missed the fairways I got decent lies in the rough.
"I was guessing the flyers right, which is difficult to do out here."
Wilcox, 27, was arguably the star performer on the day, tempering his seven birdies with just one bogey to finish in 64 strokes.
"It's a dream come true to be able to play out here. It's pretty cool," he said.
"Walking down the 18th me and my caddie looked at each other and I had to pinch myself that I'm here right now."
It was a run of three straight birdies on seven, eight and nine that left OHL Classic winner English well-placed before the final round.
Looking forward to Sunday, the Georgia-born golfer said: "I know I need to get off to a good start and make some birdies on the first few holes.
"I need to start hitting some more fairways, I haven't been hitting them too well in the past few days."
Jerry Kelly and Jimmy Walker share fourth place while a group of seven players that includes Zach Johnson and previous overnight leader Brian Stuard sits three strokes off the lead on nine-under par.
Reigning Masters champions Adam Scott came in for the day with a one-over-par 71 and is six strokes off the lead.
His fellow Australian Robert Allenby made a blistering start to the third round and hit five birdies and was five under par through 11 holes before joining the pack tied on nine under.
Bae Sang-moon of South Korea, who shot a brilliant 63 in round one before following it with a 70, was two under through six thanks to birdies at the second and third but signed for another 70 to slide out of realistic contention.