A 16-point third round moved him to 37 and a seven-point advantage over Brendan Steele in the USD3million tournament - the only one on the PGA Tour to use a Modified Stableford format which allocates points based on the number of strokes taken at each hole.
Eight points are awarded for an albatross, five for an eagle, two for a birdie, zero for a par, minus one for a bogey and minus three for a double bogey or worse. The American carded an eagle, six birdies and two bogeys.
Compatriot Steele had the best round of the day, with an eagle, seven birdies and two bogeys earning him 17 points.
Another American, David Mathis, was a point further back and two clear of Argentina's Andres Romero, the second round leader who fell off the pace after gaining just five points in his third round.