Sweden's Helen Alfredsson claimed her first victory since 1998 after shooting a final round of 70 to take the Longs Drugs Challenge in California.
Alfredsson kept her cool to win
Pat Hurst had looked on course for victory after she took a one-shot lead into the final hole but she four-putted for a double bogey and Alfredsson parred the hole to win.
Hurst had to be content with joint second on 12-under, along with Grace Park, Rachel Teske, Se Ri Pak and Yong Yeon Lee.
"When you haven't been playing well, you want it so much" said Alfredsson, whose previous best finish in 17 tournaments this year was 11th place.
Alfredsson, who entered the final round with a one-stroke lead, was one over for the day after nine holes but recorded three birdies on the backside.
She had her last birdie at the 15th and made par over the final three holes to finish on 13-under.
The final hole was a nightmare for Hurst. After a good final tee shot, she was 140 yards from the pin. Her wedge into a long downhill green was way short, landing on the fringe.
Looking for a long first putt, Hurst left it very short and her next putt for par, which would have won the tournament, wasn't much better.
She then misread a three-footer, essentially giving the victory to Alfredsson.
"I didn't close the door," Hurst said. "All I was trying to do at the 18th was two-putt. I never thought I would have been that short on a poor approach shot."