Monday qualifier Andrew Pratt carded a 4-under 66 and is alone in third place at 11-under-par 199. Eric Axley also shot a 66 and is tied for fourth with Scott Gardiner, who posted a 3-under 67, at minus-10.
Pinneo flew out of the gate on Saturday with a birdie at the first and an eagle at the par-5 third. He dropped a shot at the eighth, but reclaimed the lost stroke with a birdie at No. 9 to make the turn in 32.
The 32-year-old parred his first five holes on the back nine, but found trouble with the flat stick at the 15th. Pinneo missed a 3-footer for par to fall back to 12 under par for the championship and it looked like he would lose another shot at 17.
His drive at the par-4 hole hit a tree and bounced back into the fairway. Pinneo's approach ran through the green and settled against the back collar of rough. His chip only went 2 feet, but he holed the putt from the fringe to save par.
'I got a pretty good break on 17, then I hit a good second shot and didn't get a good break,' said Pinneo. 'I hung in there and tried to make that putt and it happened to fall in the right side for me.'
Price made the turn at 2 under par and got it to 13 under for the tournament with a birdie at 11. He dropped shots at back-to-back holes at 13 and 14, but rolled in a 15-foot birdie putt at the par-3 15th to get to minus-12.
Price bogeyed 16 to lose ground to Pinneo, but Price's approach at 18 got him back into the lead. He found the fairway off the tee, then hit his second to 2 feet. He tapped in the short birdie putt to get into a share of first place.
'I hit some good shots on the back side, but I'm playing solid and pleased with my performance so far,' said Price. 'It's a funny game. It seems like I'm starting to put a bunch of good rounds together. It's nice.'
Both leaders will be in search of their first victories on the Nationwide Tour come Sunday. Price is a seven-year veteran of the circuit and Pinneo is a tour rookie, but both have the same philosophy for the final round.
'Just keep doing what I'm doing,' said Price. 'Play my game and not worry about what anyone else is doing. I can't control what they're doing so I'm just going to keep playing the way I am.'
'I'm going to try and do the same thing I did the first three days,' said Pinneo. 'Be patient, have fun and slow down a little bit more than I did today. After that, we'll see what happens.'
Brian Henninger and Jeff Quinney both fired 65s on Saturday and share sixth place at minus-9. First-round leader Bubba Dickerson carded a 2-under 68 and is tied for eighth place with Brent Schwarzrock (67) and Kim Felton (70). That trio is knotted at 8-under-par 202.