Published: Aug 21, 2011 3:59 AM EDT
Updated: Aug 21, 2011 6:30 AM EDT

NORTH PLAINS, Ore. (AP) - Na Yeon Choi took a three-stroke lead in the Safeway Classic on Saturday, shooting a 2-under 69 to reach 8 under on Pumpkin Ridge Golf Club's Ghost Creek course.

The South Korean star, a four-time winner on the LPGA Tour, Choi had three birdies and a bogey in the second round after reeling off seven consecutive birdies in her opening 65.

Stacy Lewis was second after a 68. She started the round with four consecutive birdies, but dropped three strokes with bogeys at Nos. 5, 9 and 10.

Mika Miyazato (67) was third at 3 under.