Rickie Fowler has had eight birdies in a 7-under 64 to take a four-shot lead over Matt Kuchar into the final round of the PGA Tour's Phoenix Open.
Twice a runner-up at TPC Scottsdale, Fowler navigated a difficult two-putt on the par-4 18th hole to be 20-under 193 after three rounds.
Kuchar shot a bogey-free 65 on Saturday to put himself in position for his third victory of the wrap-around PGA Tour season.
He won the Mayakoba Classic in November and last month's Sony Open in Hawaii.
Justin Thomas, who started moving day a shot behind Fowler, shot 68 and will be five back of his friend and desert roommate headed into Sunday's final round.
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Branden Grace and Byeong Hun An were seven back at 13 under in a tie for fourth.
Australian Cameron Smith had a see-saw day but remains in the top 10 in a share of eighth at 10-under par.
His 71 included a double-bogey on the par-5 15th, three front-nine bogeys and three-straight birdies to close out his round.
