The 34-year-old from North Yorkshire in England outlasted a trio of Major champions and a recent tour winner to finish at 15-under, good enough for a one-shot victory.
Ancer will play Callaway woods and an Odyssey putter and will wear a Callaway hat in competition. Saso will play all Callaway equipment, including the ball, and will have a company staff bag.
A wild finish to the US Women’s Open saw Lexi Thompson lose a five-shot back-nine lead and Yuka Saso, 19, become the youngest winner in championship history.