Danielle Ammaccapane is alone in second place at 9-under par, followed by Karrie Webb, Vicki Goetze-Ackerman, Mhairi McKay and Grace Park, who fired a 8-under 64 Saturday. That group is at minus 8.
Sorenstam continued her assault on the front nine at Stonebridge Country Club Saturday. On Friday, she needed only 29 strokes to get through the opening nine and Saturday was not much different.
She birdied four of her first five holes, all the result of brilliant wedge play. Sorenstam rolled in putts from four feet and 13 feet at one and two and holed a pair of birdies from 10 feet at four and five.
The Swede added two additional birdies at seven and nine for a 30 to reach 15-under-par and open a seven-shot lead over the field. Sorenstam struggled around the turn when she three-putted for bogey at 10 and missed the green at 12 and failed to get up and down.
Sorenstam drained a 10-foot birdie at 16 but dropped a stroke one hole later. She reclaimed the lost shot at 18 to grab her five-shot lead over Ammaccapane.
'Today the back nine was very tough,' said Sorenstam, already a three-time winner on tour in 2002. 'The wind seemed like it was sideways on every hole. And then I think the greens got much firmer and much faster.'
Sorenstam is in good position to win for the 12th time in a little over 14 months. The world's top player is not concerned about squandering such a big lead.
'I have nothing to lose,' said Sorenstam. 'I'm playing well and hitting it well. I'm not worried about what could happen.'
Ammaccapane played in the same group as Sorenstam Saturday and despite a second-round 70, Ammaccapane sang the praises of the LPGA Tour's top-ranked player.
'I did just try to stay close to her, as close as I could,' Ammaccapane said. 'It's like I said to my caddie at one point, 'She's good.' If I shoot a great little round tomorrow, who knows? We'll see what happens.'
Ammaccapane tallied two back-nine birdies at 10 and 14 to get into sole possession of second place.
Park was flawless Saturday with eight birdies and no bogeys. She holed several putts in the 10-12 foot range en route to matching her lowest round on the LPGA Tour.
'Honestly, starting the day I wasn't even looking at the leaderboard because I was so far behind,' said Park, who has seven top-10 finishes this year. 'I was worried about shooting two-under to make the cut. I had a great start, kept making birdies, kept my patience and finished strong.'
Candie Kung and Carri Wood share seventh at 7-under-par 137.
The 36-hole cut fell at even-par 144 and 77 players advanced to the weekend. Among the notable players who missed the cut were Meg Mallon, Nancy Lopez and last week's Corning Classic champion Laura Diaz.
Full-field scores from the Kellogg-Kebbler Classic