Making her first start since the Tokyo Olympics, the second-round South Korean player closed with a bogey-free 3-under 69 at Oregon Golf Club for a four-stroke victory over Jeongeun Lee and Su Oh. Ko finished at 11-under 205.
Play was washed out Saturday because of rain and the event was cut from 72 a 54 holes. Ko took the lead Friday with a 67.
“I really wanted to play yesterday, but we couldn’t play,” Ko said. “I tried to make a no bogey-free round today, but I made it. I had a lot of missed shots and I had a lot of missed chipping or something, so I had to make great par saves, but I made it.
She took a break after the Olympics, skipping the major Women’s British Open.
“I spent a great time in Korea after the Olympics, maybe over six or seven weeks,” Ko said. “I had a lot of practice with my same coach and I had a lot of workouts, three times or four times each week.”
Ko also won the Volunteers of America Classic in Texas in early July. The two-time major champion has nine LPGA Tour victories.
Lee and Oh each shot 69. Perrine Delacour was fourth at 5 under after a 69. Patty Tavatanakit (69) estaba 4 under with Esther Henseleit (70) and Carlota Ciganda (73).
Gemma Dryburgh, a stroke behind Ko entering the round, had a 76 to drop into a tie for eighth at 3 debajo.
The tournament was shifted from Edgewater Country Club to Oregon Golf Club in June because of safety concerns about a homeless encampment bordering Edgewater.
“This course was really amazing — fairways and greens are really perfect,” Ko said.