Eun-Hee Ji has won before in Rochester. She took her first LPGA title at Locust Hill CC in 2008.
Now, she has a chance to make it the site to her second major triumph.
Ji also won the 2009 U.S. Women's Open for her other LPGA title.
Paula Creamer is part of a group of seven players tied for seventh place at 1 under par.
World No. 1 Yani Tseng is at 9 over par and tied for 59th place.