Choi Shoots 9-under 63 to lead Samsung by 2

Choi Na-yeon of South Korea shot a career best 9-under 63 to take a two-stroke lead over compatriot Shin Ji-yai in the Samsung World Championship at Torrey Pines on Saturday, the Associated Press reported.

Choi finished at 15-under 201 to tie the tournament's three-round record set by Annika Sorenstam when the Swede won here in 2002 and 2005. Choi began the day three strokes behind second-round leader Shin, who shot a 68.

Choi has never won on the U.S. LPGA Tour, but has eight top-10 finishes this year, including a tie for ninth at the U.S. Women's Open.

She made the turn at 30 after a span that included four birdies in five holes. On the back nine, she added four birdies and a bogey at No. 15, a 419-yard par-4. Her approach was about 45 feet from the hole and she left her first putt 9 feet short then failed to convert the par attempt.

Shin, who has three tour wins, kept her lead until she stumbled on the back nine, bogeying two out of the first three holes.

Ai Miyazato of Japan was in third three shots back after a third straight 68.

No. 1-ranked Lorena Ochoa of Mexico shot a 72 and was tied for fourth place with Paula Creamer, seven strokes back.