Playing partners Suzann Pettersen and Na Yeon Choi took advantage of perfect morning conditions to share the first-round lead with Jodi Ewart Shadoff in the Kraft Nabisco Championship.

Finishing before the temperature climbed into the 90s on Thursday, Pettersen and Choi had bogey-free rounds of 4-under 68 at Rancho Mirage's Mission Hills course. Ewart Shadoff matched them in the afternoon in more difficult conditions.

Anna Nordqvist and Amy Yang were a shot back in the LPGA Tour's first major championship of the year.

"The golf course is perfect," Pettersen said. "Greens are rolling pure. If you miss the fairways, you can be in a bit of trouble. The rough is deep."

Top-ranked Stacy Lewis had a 73. She made a triple-bogey 6 on No. 14, three-putting after her tee shot trickled into the water.

Michelle Wie and 15-year-old amateur Lydia Ko each shot 72 in their morning pairing. Playing the back nine first, Wie was 2 under through 13 holes, then dropped back with two bogeys.

"It was a shame. Unfortunately, made two really stupid mistakes," said Wie, who has broken 70 only once in 15 rounds this season.

Amanda Blumenherst shot a 7-over 79 after staying up late Wednesday to watch husband Nate Freiman make his major league debut with the A's. She went to bed at 11:30 p.m. and was up at 4:40 a.m. for a 7:26 tee time.

Freiman had an RBI single in his first at-bat and finished 2 for 3 in the A's 6-2 win over Seattle. In Thursday 8-2 victory, he had a sacrifice fly in his lone plate appearance.

Natalie Gulbis shot a 74 in her return to play after recovering from malaria. "I'm so excited to get back out here," she said.

PGA Tour: Matt Bettencourt and former Cal star Peter Tomasulo shot 5-under 67s to earn the surprising lead at the Texas Open in San Antonio.

Bettencourt, a former Alameda resident, and Tomasulo took advantage of warmer and calmer afternoon conditions and held a one-shot lead over Padraig Harrington, Billy Horschel, Bryce Molder and Harris English.

Rory McIlroy, who entered the tournament as a final opportunity to prep for next week's Masters, shot a 72.

Playing in the final group of the day, Tomasulo posted the only bogey-free round. Taking advantage of a medical exemption following a rib injury two years ago, he closed with a 10-foot birdie putt on the par-5 18th.

"I just played a solid round of golf to go around here with no bogeys," said Tomasulo, who is fighting to keep his tour card.

Bettencourt, who has lost his tour card and spent last year searching for answers to his severe asthma problem, made the tournament as an alternate after Henrik Stenson withdrew. He needed only 25 putts.

"My game hasn't been the concern," he said. "I've gone back and forth from three to four different inhalers and some different medications."