He lived and went to school in Yeonpyeong, South Korea before moving to Seoul and attending Konkuk University.
Most of his appearances came as a substitute but he was able to impress Suwon Samsung Bluewings manager Cha Bum-Kun enough to say that the youngster "has a long future at this club".
However, in 2007 he made it to the pitch only 12 times this year due toan ankle injury that took 6 months to heal.
With the Suwon Samsung Bluewings in desperate need of a striker to bring in goals, Seo has done his best to calm those cries.
[2] Seo made his debut for the South Korea national football team in a friendly at home to Jordan on 5 September 2008, coming on for the final 15 minutes and going close to scoring in added time.