Webb Simpson weaves his magic at the Shriners Hospitals for Children Open to lead by four strokes at TPC Summerlin, in Las Vegas, Nevada Webb Simpson / Getty Images Webb fired a second round -8 under par 63 to accumulate his -15 under par tournament total, taking advantage of the perfect scoring conditions. he was amazed at how far the ball was travelling; "The ball is really going far, I was wondering why the scores were so low yesterday morning because I thought the ball might go a little shorter. But the ball was getting out there and the golf course played a little shorter than I thought it would, and I just putted well and kept going. There's no wind, no clouds in the sky and it's really quiet, so it's easy to kind of daydream. You've really got to focus on what you're doing and talk to your caddie, at least for me. I talk to him about what we're trying to do here, where we're trying to hit the ball." J.J. Henry followed his course-record 60 with a second round of 71, leaving him tied in second place at -11 under par. With him are John Senden, Jeff Overton, Chesson Hadley and Jason Bohn. John Senden said he was looking for birdies; "I need to keep on making birdies out there, it's not as much building a score, it's just about doing a great job on making birdies, and if that's good enough to do it, well, hopefully it'll be me." Chesson said it had been a great day, and is looking forward to the week-end; "It was a great day, it's been a fantastic start to the week, and to be at 11 under and to have a chance going into the weekend is awesome. I've been in this position before as far as Web.com Tour, and certainly a little bit different stage out here on the PGA TOUR. Just looking to manage the nerves tomorrow and just realize it's just golf, and let's just go have some fun." J.J. was very disappointed with his performance; "I was 11 shots higher and I honestly don't feel like it. I didn't hit it quite as good as yesterday, but the putts just didn't fall like they did yesterday. All in all, I was a little bit disappointed, but still two rounds to go. I'm right in the thick of things."