Ryan Moore has birdied three of his last four holes at TPC Summerlin but can’t get any separation from Jonas Blixt and Brendon de Jonge, who are closest in pursuit. Moore, who just made a 7-foot birdie putt on the par-5 15th, leads his two playing competitors by one shot. De Jonge and blixt are 18 under and four clear of Jimmy Walker and Tim Herron, who are tied for fourth. De Jonge is riding a wave of three consecutive birdies as he bounces back from a four-hole stretch he played in 2 over. Blixt, who had three bogeys in his first 10 holes Saturday, has circled the last five numbers on his scorecard. The final trio has combined for 19 birdies on their first 16 holes Saturday. Moore is the only member of the group to keep a bogey-free card to this point and that has him on top by the slimmest of margins.