SAN MARTIN, Calif. – Lydia Ko leads by one stroke at the U.S. Women's Open. Here's what You Oughta Know going into the final round at CordeValle:
• Ko is making a habit of being on the leaderboard on Sundays of majors. She is seeking to win her third major in her last four starts. She has started the final round in third place or better in the last four majors.
• If Ko wins, she will become the youngest winner of the U.S. Women’s Open at 19 years, 2 months and 16 days old.