After 13 seasons on the LPGA Tour, including a pair of major victories, South Korea's So Yeon Ryu announced Thursday she will retire from professional golf next month.

Ryu made her announcement in a social media post.

"After deciding to retire, I spent much time looking back on my career," Ryu wrote in a note posted to Instagram. "So many memories came flooding back, and I felt so many emotions. But the more I thought about it, the more I was thankful for so many things.