[2] At age 17 in 2004, Choi won the ADT CAPS Invitational on the LPGA of Korea Tour (KLPGA), beating future Hall-of-Famer Se Ri Pak by four strokes.

In 2007, Choi played in the Hana Bank-KOLON Championship, an event co-sponsored by the LPGA and KLPGA Tours, and finished eighth.

She attended LPGA Qualifying Tournament in the fall of 2007, but finished two shots shy of earning a fully exempt Tour card for the 2008 season.

Her non-exempt card meant she was not automatically eligible for every event, yet her high conditional status and consistent good play put her in nearly every tournament.

[4] Her third LPGA Tour win came in July 2010 at the Jamie Farr Owens Corning Classic at which she beat three other players on the second hole of a sudden-death playoff.