CLEVELAND -- Lydia Ko won the U.S. Women's Amateur on Sunday, beating Jaye Marie Green 3 and 1 in the 36-hole final at The Country Club.
Ko, the South Korean-born New Zealander who tops the world amateur rankings, won at 15 years, 3 months, 18 days to become the second-youngest winner in tournament history. Kimberly Kim was 14 years, 11 months, 21 days when she won the 2006 tournament.
Ko won the New South Wales Open in January in Australia at 14 to become the youngest player to win a professional tour event.
The 18-year-old Green is from Boca Raton, Fla.