Kim becomes just the second multiple champion of the 2017 season, after fellow South Korean Ryu So-yeon. Eight different South Koreans have combined for 10 wins in 20 LPGA events so far in 2017.

This is the first multiple-win season on the LPGA Tour for Kim, who has been playing on the tour since 2007.

Kim started the day at 13-under, two behind the overnight leader, Nelly Korda, in second place. And Kim wasted little time making her charge, with three birdies in her first four holes en route to a six-under 28 on the front nine.

The play was suspended due to rain after Kim completed her 14th hole and held a four-shot advantage over two Americans: Gerina Piller and Thompson. When play resumed, Kim promptly picked up consecutive birdies at the 15th and 16th to lock down her title.

Kim came into this tournament having missed her last two cuts but shot the best score of the day in the final round to cap off her rally.

Kim said she felt "comfortable" with the pin positions, but above all, it was her mental sharpness that made the difference.

"I really didn't expect anything. Maybe I think that's why I played really well today," Kim was quoted as saying on LPGA.com. "Really good names are on top of the leaderboard, and I just wanted to go out and make the most out of it, and today I was able to do that."

Much like her LPGA career, the 2017 season has been a roller-coaster ride for Kim. Aside from her two wins, Kim only has one other top-20 finish this year. But the South Korean insisted she feels great about her game with two more majors -- the Ricoh Women's British Open in August and the Evian Championship in September -- on the horizon.

"I'll be more confident going into the tournaments," she said. "But at the same time, each tournament has a very unique style, and just getting used to the golf course and having the knowledge before a tournament starts, I think that's the key to play well. So I look forward to more opportunities." (Yonhap)