Victorian Su Oh equalled her best result this LPGA season and shot a final round 66 to finish in a tie for second at the LPGA Classic in Michigan.
The 23-year-old carded 20-under for the tournament and was one shot behind winner Brooke Henderson, who broke the Canadian record for Tour victories with nine.
Henderson led wire-to-wire for her second victory in three years at Blythefield Country Club, closing with a 2-under 70 in chilly conditions to hold off Lexi Thompson, Nasa Hataoka, Oh and Brittany Altomare by a stroke.
For Oh, it continues a form reversal after she missed the cut in six successive tournaments before finishing tied for 34th at the end in New Jersey earlier in June.
The 21-year-old Henderson broke a tie with Sandra Post for the Canadian record on the LPGA Tour and also moved ahead of George Knudson and Mike Weir for the overall country mark.
RIGHT: Henderson captured her ninth victory on the LPGA Tour. PHOTO: Andy Lyons/Getty Images.
Henderson matched the tournament record of 21-under that she set in 2017 (when the course played to a par of 71) and also was tied last year by So Yeon Ryu.
Henderson opened with consecutive 64s, playing 30 holes on Friday after rain delayed the start on Thursday, and had a 69 on Saturday to take a two-stroke lead into the final round.
Thompson followed her course-record 62 in the third round with a 68, closing with an eagle for the second successive day. The 2015 winner at Blythefield was coming off a victory last week in New Jersey.
The KPMG Women's PGA Championship, the third major championship of the year, is next week at Hazeltine in Minnesota.