Year - old and second youngest winner of women 's major title . Teenager fires two - under 68 to in final round to beat Michelle Thompson by three strokes . Thompson became youngest LPGA Tour winner in history .
19-year-old becomes second youngest winner of women 's major title . Teenager fires four-under 68 to in final round to beat Michelle Wie by three strokes . Thompson became youngest LPGA Tour winner in 2011 .