Choo joined Busan I'Park as a draft pick from Sungkyunkwan University for the 2011 K-League season.
[1] Lee made his first start for Busan against Gangwon FC in the fourth round of the 2011 K-League Cup, playing the full 90 minutes.
[2] In the following round of the Cup, against the Chunnam Dragons, Lee scored the only goal of the match which ensured a win for Busan.
[3] His K-League debut was on 15 May 2011, as a late substitute in a match against Incheon United.
This biographical article related to a South Korean association football midfielder is a stub.