Brandt Snedeker equalled the Natadola Bay course record to move into a tie for second after the second round of the Fiji International.
The world number 23 produced a stunning seven-under-par 65 to move one shot behind leader Matthew Giles.
Snedeker has maintained his form from the Ryder Cup after winning three points for the American team at Hazeltine as his team won the tournament for the first time since 2008.
He hit five birdies and an eagle on Thursday and the 35-year-old admits he was delighted with his performance.
"I told myself going out this morning five-under or better would put me right where I want to be," Snedeker told reporters.
"To go out and shoot seven, I know I don't have the lead, I'm one back, but I'm comfortable where I am going into the weekend, there's a lot of golf left."
Snedeker is currently tied in second with Anthony Houston and the duo sit two shots in front of Australia's Jake Higginbottom, while fellow Aussie Aaron Pike sits on his own in fifth.