Hayden Buckley finished the third day at the Sony Open in Hawaii with an eagle to claim a two-stroke lead from David Lipsky, Ben Taylor and Chris Kirk on Saturday.
Buckley carded a six-under-par round of 64 to be 15-under overall, managing two eagles on the third day along with three birdies and a bogey at Waialae Country Club.
The American sunk a 28-foot birdie putt on the eighth hole, before he moved into the lead buoyed by an excellent back nine where he nailed a 133-yard hole-out eagle on the 10th hole along with another on the 18th aided by a pinpoint approach.
Halfway leader Kirk slipped after a third-day 68 which started with a double bogey on the first hole, although he expertly produced a hole-out birdie from the bunker on the 14th to stay in contention.
Lipsky had an up-and-down round that included seven birdies and three bogeys, while Englishman Taylor birdied four of his final six holes to be tied for second at 13 under.
Andrew Putnam shared the round of the day with Nick Taylor, both carding eight-under-par rounds of 62, with the former moving to 12-under overall.
Putnam, who managed a career-high 10 birdies, is tied with Si Woo Kim, who had a strong third round with seven birdies in his 64.
Will Gordon and Nate Lashley are a further shot back at 11 under, while J.J. Spaun's third-round 71 saw him drop to well off the pace and nine under.
Two-time major winner Hideki Matsuyama enjoyed his best round at the Sony Open with a 65, leaving him at eight-under overall.