Spencer Levin shot a three-under 68 on Saturday to take a six-stroke lead into the final round of the Phoenix Open.
Under perfect conditions, Levin played out an assured 18 holes, the highlight of which was a 16-foot birdie putt on a par-3 fourth.
Webb Simpson also carded a 68 and remains second, while Bubba Watson and John Huh are seven strokes off the pace, after rounds of four-under and two-under respectively.
The crowd of 173,210 at TPC Scottsdale's Stadium Course set a new course record.