An almost flawless second round saw Grayson Murray hit the front by two strokes at the Sanderson Farms Championship.
American Murray catapulted himself atop the leaderboard with a seven-under-par 65 in Jackson, Mississippi on Friday.
A PGA Tour rookie, Murray bogeyed his first hole on the back nine but it was smooth sailing from that point as the 23-year-old posted eight birdies, including his final shot to improve to 12 under and cement his lead at the halfway stage of the tournament.
How about this final approach from Grayson Murray?-- PGA TOUR (@PGATOUR) October 28, 2016
He made the birdie to shoot 65. pic.twitter.com/ZXog29BhuY
International pair Greg Owen and Seamus Power are tied for second at 10 under at the Country Club of Jackson.
England's Owen carded back-to-back 67s to rise 10 positions, alongside Irishman Power, who remains second following his three-under-par 69.
A stroke further back is 2009 U.S. Open champion Lucas Glover (69), Brandon Hagy (68), Graham DeLaet (69) and Trey Mullinax (70).
Overnight leader Kevin Streelman had a round to forget as he dropped into a tie for eighth at eight under.
Boasting a two-shot lead when the second round teed off, Streelman had a double-bogey and two bogeys for a one-over-par 73.
Dicky Pride (70), Nick Taylor (68), Andres Romero (69), Cody Gribble (63) and Hiroshi Iwata (70) are also four shots off the pace heading into Saturday's penultimate round.