Webb Simpson shoots 4-under 67 to maintain 4-stroke lead in Las Vegas

Webb Simpson hits out of the trap on the ninth hole in the third round of the Shriners Hospitals for Children Open golf tournament, Saturday, Oct. 19, 2013, in Las Vegas. (AP Photo/Julie Jacobson) (The Associated Press)

Webb Simpson, left, watches his tee shot off the eighth hole with John Senden in the third round of the Shriners Hospitals for Children Open golf tournament, Saturday, Oct. 19, 2013, in Las Vegas. (AP Photo/Julie Jacobson) (The Associated Press)

LAS VEGAS – Webb Simpson maintained a four-stroke lead Saturday in the Shriners Hospitals for Children Open, birdieing four of the last seven holes at TPC Summerlin

Making his first start since helping the U.S. win the Presidents Cup, the 2012 U.S. Open champion shot a 4-under 67 to reach 19 under. He opened with rounds of 64 and 63.

Chesson Hadley was second after a 67, reaching 15 under with an eagle on the par-5 16th. The Web.com Tour Championship winner last month, Hadley is making his fourth career PGA Tour start.

Jeff Overton was third at 14 under after a 68.

Jason Bohn had a 69 to reach 13 under, and Sean O'Hair shot a 63 to join first-round leader J.J. Henry, defending champion Ryan Moore, William McGirt, Ryo Ishikawa and Russell Knox at 12 under.

After opening with a course-record 60, Henry has shot 71-70. McGirt shot 64, Ishikawa had a 68, and Moore and Knox shot 69.