Brooke Henderson sank a short eagle putt on the first play-off hole on Sunday to win the ShopRite LPGA Classic in New Jersey.
Henderson outdueled Lindsey Weaver-Wright in the play-off. Both players shot 12-under in regulation but Weaver-Wright made a par 5 on the play-off hole at 18.
Henderson shot a seven under 64 on Sunday while earning her 11th career victory. Weaver-Wright fired a 65.
Henderson set up her victory with a stellar second shot on the play-off hole with the ball stopping about six feet from the hole. Weaver-Wright reached the green on her third shot and then missed a birdie putt before completing her par.
With two putts to win, Henderson needed just one as she knocked the short put tin the hole.
"With play-offs, you really only have one opportunity so I just tried to go out and hit really solid shots," Henderson said afterwards.
"So to walk up that fairway and see that I only had a pretty short (putt) was a big relief. Just needing two putts to win was also really clutch."
Henderson's victory is her first since prevailing at the LA Open nearly 14 months ago.
"I'm just super excited," Henderson said. "It felt like a long time since my 10th victory. I've been putting in some work."
Ireland's Leona Maguire was not involved in Sunday's final round having missed the cut.
Jodi Ewart Shadoff eagled No 18 to finish alone in third at 11 under. The Englishwoman also had four birdies and two bogeys while carding a 67.
Lydia Ko of New Zealand and Albane Valenzuela of Switzerland both shots 67s and finished tied for fourth at 10 under.
Brittany Lincicome (67), New Jersey native Marina Alex (67) and Japan's Nasa Hataoka (68) tied for sixth at nine-under.
Lincicome is competing despite being six months pregnant.
"Yeah, 12 weeks to go," Lincicome said. "Everyone was like, you should just shut it down. I haven't been playing, which they were right. I haven't been playing well.
"But to go and sit at home and not play, I felt like time was going to go by slower."
Defending champion Celine Boutier of France fired a torrid 63 to move into a tie for ninth at eight under.
Joining her were Brittany Lang (67) and SouthKorea's Jenny Shin (66).
World No. 1 Jin Young Ko of South Korea finished on five-under after a final-round 70.