First-round co-leader Chris Anderson posted a 2-under 70. He is tied for third place at 11-under-par 133 with Elliot Gealy (68) and John Connelly (67). Kelly Gibson, Shane Bertsch, Johnson Wagner and Tyler Williamson are one stroke further back at minus-10.
Jones got his round going on the back nine at the Black Creek Club. He dropped in a 4-foot birdie putt on No. 10. After four straight pars, he moved to minus-8 when he rolled in a 25-footer for birdie at the 15th.
The Australian dropped a 7-iron within 6 feet to set up eagle at the par-5 18th to get to 10 under. Around the turn, Jones ran off three straight birdies from the fourth to climb to 13 under.
However, he stumbled to a bogey at the par-4 ninth to slip into a tie for the lead.
'The wind is swirling out there,' said the 24-year-old Jones. 'It is not playing easy out there. The par-5s are where you're going to score out there. It is nice to post a score and get myself in contention.'
Caron, who also started on the second nine, opened with a 35-foot birdie putt at the 10th and picked up another on the 12th to move to minus-6. He poured in three consecutive birdies from the 14th to jump up the leaderboard.
The 31-year-old moved to minus-10 with a two-putt birdie at the 18th. Around the turn, Caron birdied each of the front nine par-5s, Nos. 4 and 6, to take a share of the lead.
'The sand save on No. 11 got my round going,' said Caron, the runner-up at the 2001 Gila River Classic. 'Today was the easiest 8 under I can remember. I want to win. I know if I can just win it will spring me to greater things.'
Bart Bryant fired a 7-under 65 to move to 9-under-par 135. He is joined in a tie for 10th place by Craig Lile, Doug Barron and Scott Weatherly.
Franklin Langham, Keith Nolan, Brad Ott, Warren Schutte, Bobby Kalinowski, Gavin Coles and Chris Tidland are one stroke further back at minus-8.
Michael Long, the second overnight co-leader, stumbled to a 3-over 75. He stands at 6-under-par 138 in a tie for 32nd place.
The cut line fell at 5-under-par 139 with 60 players advancing to the weekend. Among those missing the weekend are Jason Gore (140), Jeff Gove (141) and two-time winner this season Jimmy Walker (141).