Ben Curtis made a 5-foot birdie putt Friday on his final hole, giving him a one-stroke edge over Jose Coceres at the midway point of the Booz Allen Classic.
Curtis followed his first-round 62 with a 65 at the TPC at Avenel in Potomac, Md., putting him at 15-under-par and setting a tournament record for best score after 36 holes. The 2003 British Open champion saved par from greenside traps on back-to-back holes before his final birdie.
Coceres shot a second consecutive 64 as he seeks his first PGA Tour victory in five years. Jeff Gove was four shots off the lead, with John Huston and Brett Quigley another stroke behind as low scores continue to dominate on a course that looks relatively easy following last week's U.S. Open.
South Korea's Shi Hyun Ahn shot a 1-under 71 to retain a one-stroke lead after the second round of the Wegmans LPGA in Pittsford, N.Y.
Ahn hasn't won since her LPGA Tour debut in 2003.
She moved to 8-under 136, just ahead of 20-year-old rookies Seon-Hwa Lee, another Korean who won the ShopRite Classic three weeks ago, and Bethany Lang, a runner-up at the U.S. Women's Open last year.
Dalhousie Golf Club touring professional Karen Stupples failed to make the cut.
Allen Doyle had nine birdies -- six on putts of less than 10 feet -- in a 7-under 64 that gave him a one-stroke lead over Gil Morgan after the first round of the Commerce Bank Championship in East Meadow, N.Y.
Colin Montgomerie shot his second straight 5-under 68 to take a two-shot lead after two rounds of the Johnnie Walker Championship in Gleneagles, Scotland.
Paul Casey, with a 71, was second with four players another shot back in third.
-- The Associated Press