Career
Early career
After graduating high school in 2010 Moon took part in the Nike, Incorporated. sponsored competition "The Chance" in early 2011. He became one of the eight winners who got to move to England and join the Nike Academy that summer. Östersunds FK
Moon was signed by third tier Swedish club Östersunds FK in 2012 after their English manager Graham Potter spotted him while he was in his homeland to scout Ghanaian David Accam who also was training with the Nike Academy at the time.
The club got promoted to the second tier Superettan but after the 2013 season Moon decided to move back home to South of Korea due to homesickness.
However, halfway into the preseason of 2014 he returned to Östersund and signed with the club again. Djurgårdens IF
On 17 July 2015 Moon was signed by Allsvenskan side Djurgårdens IF. The club had originally planned to sign him for the start of the 2016 Allsvenskan, but after a season ending injury to their right winger Haris Radetinac they decided to loan him from Östersund for the rest of the year with an option to buy at the end of the loan.
