He joined FC 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.
Upon completion of his military service he returned to FC Seoul (formerly the Anyang LG Cheetahs), where he resumed his role as a bench warmer.
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).
[1] A shift to Daegu FC in 2006[2] finally saw Back getting regular game time as a first team squad member.
On 27 February 2012, before the 2012 K-League campaign, Back moved to Gyeongnam FC on a free transfer.