LAS VEGAS — Webb Simpson got the fast start he was looking for, both in the final round at TPC Summerlin and in the PGA Tour's new wraparound season.Simpson birdied two of the first three holes Sunday, pulling away for a six-stroke win in the second event of the season. "One over through three (Saturday) and 2 under (Sunday) felt like a huge difference," Simpson said. "And it was because it really let me slow down and pace myself, and you know, try to let the guys come after me." Winning for the first time since the 2012 U.S. Open, Simpson closed with 5-under 66 in the Shriners Hospitals for Children Open. He finished at 24-under 260 after opening with rounds of 64, 63 and 67 to take a four-stroke lead into the final round. "As we were going kind of middle of the round, pins were tough, greens were drying out and I knew it would take a really special round for somebody to shoot 7, 8 under," Simpson said. "So, I felt like I was in control, and I asked my caddie once I hit it on the green on 17 where we stood. And I was just thankful that I was able to kind of manage my golf ball the last couple rounds." Simpson earned $1.08 million for his fourth tour title. In addition to last year's U.S. Open, he won the Wyndham Championship and Deutsche Bank Championship in 2011. Ryo Ishikawa and Jason Bohn tied for second. Ishikawa, the Japanese player who had to play the Web.com Tour Finals to regain his PGA Tour card, shot 65. Bohn had 66. Charley Hoffman was fourth at 17 under after 64. LPGA: Amy Yang birdied the first playoff hole to beat South Korean compatriot Hee Kyung Seo and win the KEB HanaBank Championship in Incheon, South Korea, for her first career title. Yang sealed the win with a 15-foot birdie putt on the par-5 18th. Both finished regulation at 9-under 207. "I've been waiting for this championship for a long time," said Yang, a tour member since 2009. Third-round co-leaders Katherine Hull-Kirk and Anna Nordqvist were virtually nonfactors. Nordqvist shot 74 that left her tied for eighth, and Hull-Kirk had seven bogeys en route to 80. Michelle Wie, who started the round tied for 22nd, had the day's lowest score of 66 and finished tied for third at 8 under. Seminole's Brittany Lincicome shot 69 and finished seventh at 5 under, her third top-10 finish this season. CHAMPIONS: Michael Allen won the Greater Hickory Classic in Conover, N.C., for his fourth tour title, beating Olin Browne with a birdie on the first hole of a playoff. Allen closed with 5-under 65, also birdieing the par-5 18th in regulation to match Browne at 13-under 197 at Rock Barn. Browne shot 64. Korea Open: Kang Sung-hoon won after Kim Hyung-tae was informed of a two-shot penalty when he led by one with two holes to play in Cheonan, South Korea. Kim (77), who started the final round with a four-shot lead, argued he never grounded his club on the 13th hole. The OneAsia Tour said he discussed the violation with tournament officials for two hours. The Korean Golf Association voted 5-3 against him. It was an awkward ending for Kang, who closed with 69 for 4-under 280 and a one-shot win over Kim, Rory McIlroy (67) and two others. The four-way tie for second was the best for McIlroy since he was runnerup at the Texas Open in April.