Brooks Koepka has opened up a one-shot lead at the halfway stage of the Frys.com Open at CordeValle Golf Club in California.
The 23-year-old American, who usually plays on the European Tour, backed up yesterday's 67 with a 64 to finish his second round on 11-under-par.
Leading the chase is Jason Kokrak, who finished with an eagle to get to 10-under-par.
Robert Garrigus and Jim Herman follow on nine-under-par, while Camilo Villegas is four shots off the pace.
The best round of the day belonged to Andres Gonzales, who signed for a nine-under 62 to get to six-under-par for the championship.
Anyone over par missed the cut, which means that Marc Leishman (+1), John Senden (+1), Billy Horschel (+1) and Angel Cabrera (+5) will be free for the weekend.
