Central midfielder who joined the South Korean national team in 2008.
He spent five seasons at John Paul College in Brisbane under the Brain Soccer Program, and made his senior team debut in 2006 with FC Seoul.
Considered one of the top South Korean prospects, he was courted by a number of European teams, and ultimately signed with Celtic F.C. in 2009.
His father sent him to Australia to learn both soccer and the English language.
He played alongside Aiden McGeady on Celtic F.C. from 2009 to 2010.