Webb Simpson opened a four-stroke lead Friday in the Shriners Hospitals for Children Open, taking advantage of perfect scoring conditions at TPC Summerlin in Las Vegas.
Making his first start since helping the United States win the Presidents Cup, the 2012 US Open champion shot an 8-under 63 to reach 15 under. He had nine birdies and a bogey.
The four-stroke lead broke the tournament second-round record of three set by Lon Hinkle in 1984 and matched by Rich Fehr in 1996 — both when the event was 90 holes.
J.J. Henry followed his course-record 60 with a 71 to join John Senden, Jeff Overton, Chesson Hadley, and Jason Bohn at 11 under. Full story for BostonGlobe.com subscribers.