Brian Stuard has fired back-to-back 65s to hold a one-stroke advantage at the half-way stage of the Sony Open in Hawaii.
Teeing off on the 10th in round two, the 31-year-old from Michigan offset a single bogey at 17 with four birdies and an eagle three.
Stuard, whose best-ever PGA Tour performance came in Mexico during November when he tied-for-second at the OHL Classic, is one clear of Australian Marc Leishman and Japan's Hideto Tanihara.
Leishman fired a joint best-of-day six-under-par 64, while Tanihara had a 65.
Stuard has now enjoyed seven straight rounds in the 60s at Waialae and the American admits: "It's something to do with the greens.
"I feel comfortable on the greens. I feel like I read them pretty well and I'm able to make putts."
Shot of the day
However, the best shot of the day belonged to James Hahn who registered an albatross at the par-five ninth where he holed out with a six-iron from 191 yards.
The wonder stroke enabled Haan to reach the turn in 31 shots before the South Korean-born resident of California lost his touch over the back nine which he covered in 37.
With 36 holes remaining, Haan is tied-for-17th, five strokes off the pace.
Adam Scott, the biggest name playing in Honolulu, is three shots adrift following rounds of 67 and 66.
The Aussie is tied with overnight leader Sang-Moon Bae who followed an opening 63 with a level par 70, while last week's winner at Kapalua - Zach Johnson - is a further two strokes behind.
Round three has been brought forward due to bad weather in Hawaii. Our live TV coverage will now start at 9:30pm on Sky Sports 2 HD and then move to Sky Sports 4 HD at 11pm.