American Lewis grabs Swinging Skirts lead
Stacy Lewis tees off from the 3rd hole during Round Two of the Swinging Skirts LPGA Classic at the Lake Merced Golf Club on April 25, 2014 in San Francisco, California - by Jed Jacobsohn
American Lewis finished 36 holes at Lake Merced Golf Club at six-under-par 138.
"We knew it was going to be a long day," said Lewis who earned three victories in 2013. "That's the way I took it, one shot at a time and tried to get the ball in the hole.
Second round play was stopped for 80 minutes because of a rain storm.
"That's what I tried to do. Get it in the hole as fast as I could. Fortunately I was able to do that and make a couple putts."
First-round leader Karine Icher of France shot a one-over 73 and is tied with Kiwi Lydia Ko (71) for second place at five-under 139.
World number one Park In-Bee of South Korea tied the low round of the day with a four-under 68 to jump into a share of fourth with Lee Il-Hee (73) and Mika Miyazato (69) at three-under 141. Suzann Pettersen (72) is among nine players tied for seventh at two-under.
Pettersen was joined by P.K. Kongkraphan (68), Catriona Matthew (69), Kang Hae-Ji (70), Brittany Lang (71), Paola Moreno (71), Carlota Ciganda (72), Kim Hyo-Joo (73) and Jenny Shin (74).
Lewis, who began on the 10th hole, opened her round with six straight pars before rolling in back-to-back birdies at the 16th and 17th to move to five-under.
She birdied the eighth to reach six-under and parred the last hole.
Icher followed five straight opening pars with a bogey at the sixth to fall to five-under.
She parred her final four holes to finish at five-under.
"It's a tough golf course," Icher said. "You can be quick in trouble, or if you're playing well, like yesterday I did think it goes pretty well -- but today with the wind and the rain it's definitely a tough day."