Tseng closed with a 6-under 66 on Sunday to finish at 19-under 269 at Locust Hill Country Club, matching the LPGA record low score at a major. And her dominating performance came a year after Cristie Kerr shot the same score to win the tournament by a whopping 12 strokes.

Tseng bettered Se Ri Pak, who was 24 when she won her fourth major. For Tseng, it was her eighth career LPGA Tour victory, second in a row and third of the season. She has three other victories this year, sweeping the Australian Open and Masters and winning in Taiwan.