Yi was born in Uijeongbu, South Korea.

She turned professional in 2006 and joined the Duramed Futures Tour.

Her first LPGA Tour victory came at the 2009 Jamie Farr Owens Corning Classic.

[1] LPGA Tour playoff record (1–0) Results not in chronological order before 2014.

This biographical article relating to golf in South Korea is a stub.