PORTLAND, Ore. -- Thailand's Pornanong Phatlum birdied three of her last four holes Friday to maintain a one-stroke lead after the second round of the Safeway Classic.
The 23-year-old Phatlum, winless in five seasons on the LPGA Tour, followed her opening 8-under 64 with a 66 for a tournament-record 14-under 130 total at rain-softened Columbia Edgewater.
Norway's Suzann Pettersen, the 2011 tournament winner at Pumpkin Ridge, was a stroke back at 13 under after a bogey-free 63. Germany's Sandra Gal was 12 under after her second straight 66, and countrywoman Caroline Masson was another stroke behind after a 64.
A 72-hole event for the time, the tournament is back at Columbia Edgewater after four years at Pumpkin Ridge. Columbia Edgewater also was the tournament site from 1990-2008.
Cristie Kerr, the winner in 2008 at Columbia-Edgewater, was 10 under along with fellow Americans Lizette Salas and Sandra Changkija. Changkija had a 66, and Kerr and Salas shot 68.
Yani Tseng was another stroke back at 9 under with Se Ri Pak and Lexi Thompson. Tseng and Pak shot 68, and Thompson had a 70. Second-ranked Stacy Lewis was 7 under after a 70.
Michelle Wie followed her opening 67 with a 73 to drop to 4 under. Defending champion Mika Miyazato birdied the final two holes for a 71 to reach 2 under and make the cut by a stroke.