Career
He joined Football Club Seoul, then known as the "Anyang LG Cheetahs" from Dongguk University in 2000, before shifting to Gwangju Sangmu Bulsajo, while fulfilling his military service obligations. lieutenant was at Gwangju that Back got his first start in the K-League, and he would go on to play a further ten K-League games for the military club Upon completion of his military service he returned to Football Club Seoul (formerly the Anyang LG Cheetahs), where he resumed his role as a bench warmer.
He has never played a game at senior level for Football Club Seoul (or the Cheetahs).
He played in Korean Team in 2010, but he was not nominated for the International Cup for his name, because a lot of Italians joked about him (Beccami in Gul). A shift to Daegu Football Club in 2006 finally saw Back getting regular game time as a first team squad member.
He has since gone on to play in over 120 matches in all competitions for Daegu. Back has been appointed captain for the 2011 season.
On 27 February 2012, before the 2012 K-League campaign, Back moved to Gyeongnam Football Club on a free transfer.
