Paula Creamer, who won last year’s tournament with a 75-foot putt, struggled to a 74. Michelle Wie had a 73 that included a double-bogey on the par-5 No. 7.
Lexi Thompson had a hole-in-one on the par-3 14th and was tied for ninth at 3-under 69.
"I hit a low controlled 7-iron from 150," Thompson said of her ace. "It was looking good the whole way, so I was just waiting for it to drop. I let go of my club. I don’t even know what I did honestly."