Sei Young Kim won the Marathon Classic on Sunday for her second LPGA Tour victory of the season, making five straight birdies in a mid-round burst and shooting a 6-under 66 for a two-stroke victory over Lexi Thompson. Kim finished at 22-under 262 at Highland Meadows Golf Club. The 26-year-old South Korean player has nine tour titles, also winning the LPGA MEDIHEAL Championship in May in California. Thompson, a stroke behind Kim entering the day, closed birdie-eagle for a 66. Stacy Lewis was third at 16 under after a 66. U.S. Women's Open champion Jeongeun Lee6 had a 69 to finish fourth at 14 under. Jennifer Kupcho tied for fifth at 11 under after a 71. Linnea Strom (65), Tiffany Joh (67), Caroline Masson (68) and Pavarisa Yoktuan (69) also were 11 under.