LAS VEGAS — Former US Open champion Webb Simpson moved closer to a fourth victory on the PGA Tour as he maintained a commanding four-shot lead after Saturday's third round of the Shriners Hospitals for Children Open in Las Vegas. Though not quite matching the high standard of play he produced over the first two days at the TPC Summerlin, the American finished strongly with four birdies in the last seven holes to card a four-under-par 67. That left Simpson at 19-under 194 in the second event of the PGA Tour's 2013-14 season, with 26-year-old rookie Chesson Hadley alone in second place after eagling the par-five 16th on the way to a 67. Former US Ryder Cup player Jeff Overton (68) was a further stroke back at 14 under, one ahead of fellow American Jason Bohn (69). Sean O'Hair fired a best-of-the-day 63 to finish at 12-under 201, level with five others including fellow American William McGirt (64), Scotland's Russell Knox (69) and Japan's Ryo Ishikawa (68). Simpson, however, commanded the spotlight as he recovered from an early bogey to stay atop the leaderboard on another ideal day for low scoring in the high Nevada desert where there was barely a breath of wind. “The greens were a little more firm, a little burned out and a little faster, and I think I was a little too tentative,” Simpson told Golf Channel when asked to explain his slow start to the third round. “The speed of my long putts kind of hurt us on the front (nine). I would run them four or five feet by, or leave them short. I couldn't really get a feel for it but finally on the back nine I got some birdies going.” Four ahead overnight, the 2012 US Open champion briefly dropped back into a tie for the lead with Bohn at 14-under after running up a three-putt bogey at the par-four third. Simpson said that a chat with his experienced caddie Paul Tesori helped him regain consistency — Reuters