WILLIAMSBURG, Va. (AP) So Yeon Ryu had six birdies in an eight-hole stretch and shot a 7-under 64 on Friday to take the second-round lead in the Kingsmill Championship.
Ranked 11th in the world but sixth in the race for the four spots on South Korea's Olympic team, Ryu opened with a bogey on the 10th hole, then used the birdie run to make the turn in 5-under 30.
The 2011 U.S. Women's Open champion added birdies on the par-4 fourth and par-5 seventh and closed with two pars to reach 7-under 135 on the soggy River Course.
Fourth-ranked Stacy Lewis, No. 6 Amy Yang and first-round leader Mika Miyazato were a stroke back. Lewis had a bogey-free 66, Yang had a 67, and Miyazato followed her opening 65 with a 71.
Lewis tied for second two weeks ago in Alabama for her 10th runner-up finish in a 49-event drought. The 11-time tour winner has 23 career second-place finishes.
Top-ranked Lydia Ko was 1 under after 68.