(SYLVANIA, OH) - Sei Young Kim won the Marathon Classic on Sunday for her second LPGA Tour victory of the season, making five consecutive birdies in a midround burst and shooting a 6 under 66 for a two-stroke victory over Lexi Thompson. Kim began the birdie run on No. 7 and finished at a tournament-record 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. Six shots ahead of Thompson after the birdie run, Kim played the final seven holes in even par, offsetting a birdie on 15 with a bogey on 1. Kim broke the event mark of 263 set by In-Kyung Kim in 2017. She's focused on winning her first major title, with The Evian Championship and Women's British Open coming up. Stacy Lewis was third at 16 under after a 66. U.S. Women's Open champion Jeongeun Lee had a 69 to finish fourth at 14 under. Jennifer Kupcho tied for fifth at 11 under after a 71, playing alongside Lewis.