First-round leader Eduardo Herrera carded a 1-over 73 on Friday and is part of a group tied for fifth place at 6-under-par 138. Jeff Freeman (69), Blaine McCallister (68) and John Elliott (69) joined Herrera two shots off the lead.
Quinn opened his round with six consecutive pars before a bogey at the par-3 seventh. From there, Quinn went on a birdie tear around the turn.
Quinn reached the par-5 eighth green in two and two-putted from 30 feet for birdie. He knocked a 7-iron to 12 feet to set up birdie at the ninth, drained a four-footer for birdie at 10 and made it four in-a-row with a three-footer at No. 11.
'I didn't even realize I had made four birdies in a row, that's how focused I was,' said Quinn, a two-time winner on the Nationwide Tour. 'It was a slow start with six pars out of the gate. I stayed patient which is the key on this golf course.'
Quinn stumbled on his back nine with a three-putt bogey at the 13th and another bogey at 14. He rebounded with six-foot birdie putt at 15 and capped off his round of 69 with a 20-foot birdie at the last.
'I drove the ball really well. I virtually did everything well,' said Quinn. 'I played very solid today. Thirty-six holes is a long way to go but I'm really happy with the way I'm playing right now.'
Long had the best round of the day Friday with a 7-under 65.
'I couldn't be happier,' said Long. 'Today I rolled the putter beautifully from 10 feet.'
Lile was alone in the lead at 9-under par but dumped two balls into the water on his final hole and left with a double-bogey. He still finished with a 67.
'It couldn't have happened at a worse time,' said Lile, who made into the field thanks to being the medalist at Monday's qualifying. 'It turned out to be a pretty good six. I could have had a 15 there.'
Dan Pohl (71), Ted Purdy (66), Ryuji Imada (66), Rob Bradley (68), Zach Johnson (70), Russ Cochran (70), Ryan Palmer (70) and Josh Broadaway (70) share ninth place at 5-under-par 139.
The 36-hole cut fell at even-par 144 and 67 players advanced to the weekend.