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 United States win the Presidents Cup last month, the 2012 U.S. Open champion shot 4-under 67 to reach 19-under 194."The conditions were perfect," Simpson said. "I knew guys were shooting low numbers. I felt like I was playing good enough. I just was shooting pretty bad — parred 9, dropped the shot at 11. So, it was frustrating. "But my caddie just told me to stay patient and let the birdies come. And that's what happened. I made some putts coming in."Chesson Hadley was second after 67, reaching 15 under with an eagle on the par-5 16th. The Web.com Tour Championship winner last month, Hadley is a rookie making his fourth career PGA Tour start. Jeff Overton (68), seeking his first tour victory, was third at 14 under. Jason Bohn had 69 to reach 13 under, and Sean O'Hair, who had to play the four-event Web.com Tour Finals to regain his tour card, shot 63 to sit in a group of six at 12 under. "I think it was a tough time this year for me, especially late because I was realizing I was going to lose my card," O'Hair said. "I just had to get my mind right going into those Web.com events. … I really feel good about my game right now, everything about it." LPGA: Anna Nordqvist and Katherine Hull-Kirk shot 2-under 70 to remain tied for the lead after the second round of the KEB HanaBank Championship at Incheon, South Korea. The two other first-round co-leaders, Ju Young Pak (71) and Amy Yang (71), were one shot back with Suzann Petterson (69). Seminole's Brittany Lincicome (71) was 2 under. Champions: First-round co-leader Bernhard Langer shot 4-under 66 and was alone at the top with a two-stroke lead at 10-under 130 after the second round of the Greater Hickory Classic in Conover, N.C. Michael Allen (65), Brad Bryant (66) and John Riegger (67) were tied for second. First-round co-leader Anders Forsbrand (70) and Dick Mast (73) were at 6 under and 3 under, respectively. Korea Open: Rory McIlroy began the day two shots off the lead but shot 4-over 75 in the third round and finished the day 10 shots behind leader Kim Hyung-tae (66), who was at 9-under 204 in the OneAsia Tour event at Cheonan, South Korea.