Koh joined FC Seoul, then known as the Anyang LG Cheetahs, in 2003. In 2015 he moved to Al-Rayyan. In September 2019, he moved to Slaven Belupo in Croatia, but left the club two months later.[2]
On 23 May 2011, Koh was called up to the South Korea national team for the friendly matches against Serbia and Ghana, though he did not play.[4] He made his national team debut in a friendly match against Australia on 14 November 2012 in a 2–1 loss.
Career statistics
Club
As of 30 July 2022
Appearances and goals by club, season and competition