Chris Kirk is alone atop the leaderboard at 11 under following Friday's second round of the Sony Open in Hawaii.
Kirk was in a three-way tie for the lead after shooting a six-under 64 on Thursday, and he followed it up with a 65 in his second trip around Waialae Country Club.
He began his round in blistering fashion, collecting birdies on each of the first three holes to put himself in a commanding position, and he finished with a birdie on the 18th.
J.J. Spaun looked a sure thing to finish the day tied with Kirk at 11 under as he reached his final hole – the par-five ninth – with a share of the lead.
Despite it playing as the easiest hole on the course, Spaun found the water, resulting in his first bogey of the week to head into the weekend at 10 under.
Spaun is tied for second with American compatriot Taylor Montgomery, while Hayden Buckley and David Lipsky are at nine under to round out the top-five.
England's Ben Taylor is part of the three-man group at eight under, Germany's Stephan Jaeger is at seven under, Kim Si-woo is at six under and former Masters champion Adam Scott headlines the group at five under.
Hideki Matsuyama finished the day two strokes inside the cut-line at three under, while joint first-round leader Jordan Spieth imploded for a five-over 75 to miss the cut at one under.