Brittany Lincicome fired a tournament-record 64 to take a two-shot lead after one round of the Pure Silk-Bahamas LPGA Classic on Thursday.
Lincicome recorded one eagle and seven birdies during her 9-under round on the Ocean Club Golf Course.
"I was making everything -- 30-footers, 10-footers, 5-footers. It was a pretty easy day," Lincicome said after her round. "I didn't really have to make too many par saves, which was nice. And would have loved to have had a 4 on that last hole to have no 5s on the scorecard."
Fellow Americans Megan Khang and Stacy Lewis and Thailand's P.K. Kongkraphan were tied for second with 7-under 66s.
France's Celine Herbin, China's Simin Feng and American Gerina Piller were another shot back.
Top-ranked Lydia Ko of New Zealand isn't playing in the tournament. Second-ranked Ariya Jutanugarn of Thailand shot 75.
Meanwhile, Lincicome required only 24 putts during her solid round.
"Putting, I have no idea," Lincicome said. "We play little games with my husband or friends or whoever, but it's not like I go to the putting green and work on it for hours. Like it's just one of those things, hit or miss.
"Like I had a par save on 16, I did it cross-handed. I putted the last little 2-footer in cross-handed. Just whatever I kind of feel, I just do it."
The 64 is the second-lowest round of Lincicome's career. She shot a 61 at the CVS/Pharmacy LGPA Challenge in 2010.
Defending champion Hyo Joo Kim of South Korea shot a 71.