Steve Pate, who shared the lead entering round three with Harrison Frazar, had a 69 to share second place with Chris Couch (68) at 15-under 201.
Greg Chalmers (67), Kevin Na (66) and John Senden (69) are one stroke further back.
"I made a lot of birdies today and one eagle," Funk said. "I finally hit the fairway on five and I got rewarded today as I made eagle. Obviously everyone is making lots of birdies so you have to get as many as you can. I still have to go low on Sunday to have a chance at winning this."
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