Choi posted her lone professional victory in the 2015 Marathon Classic in Sylvania, Ohio, defeating countrywoman Ha Na Jang in a playoff. The win came seven years into her LPGA Tour, a span of 157 events. Choi competed on the Futures Tour (now Epson Tour) in 2008 before earning her LPGA Tour card for 2009 via Q-School. In 11 U.S. Women’s Open starts, her best finish is a tie for 13th in 2011 at The Broadmoor. She owns five top 10s in majors, including a solo third in the 2017 KPMG Women’s PGA.