Funk's overall score, 20-under 268, broke the open record for most strokes under par.
The win was Funk's fifth on the senior tour.
"I just tried to keep the pedal to the metal and go down as low as I could get," Funk said.
"On a couple of occasions when I got in trouble, I got out of trouble. I had some clutch putts or good wedges in there."
Funk, 53, collected a check for $470,000, the biggest of his Champions Tour career.
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