Matt Every produced a sparkling eight-under-par 62 to take an unlikely one-shot lead at the midway point of the Greenbrier Classic at Old White TPC.
Every began the day seven shots off the pace at one under par, but carded eight birdies in a blemish-free round to lead by one from a group of five players, including joint overnight leader Johnson Wagner.
"I played really well tee to green, finally made some putts," Every told www.pgatour.com. "I haven't made anything all year and it just finally happened today.
"I've been waiting for it."
Every's round put him a stroke clear of fellow Americans Wagner, Daniel Summerhays, Bill Lunde and Russell Henley, as well as Australia's Steven Bowditch.
"I played really well tee to green, finally made some putts"
Of the five, Henley made the biggest surge, carding a five-under 65, although he could have been one clear at the top but for a double bogey at the fifth, while Wagner could not build on his good work on day one as he could only manage a level-par 70.
Tommy Gainey, who led alongside Wagner after day one, had an even more disappointing day, as he threw away the outright lead having begun with two birdies before slipping to a one-over 71.
That put him level with the two leading European performers, England's Greg Owen and Jonas Blixt of Sweden, and former Open winner Ben Curtis.
Another Englishman, Brian Davis, was at five under while Gary Christian made the cut on two under.
Phil Mickelson, Lucas Glover and Vijay Singh were among the players who failed to make the cut, which was set at one under.