|Full name||Seo Yong-Duk|
|Date of birth||10 September 1989|
|Place of birth||South Korea|
|Height||1.75 m (5 ft 9 in)|
|2007–2009||South Korea U-20||17||(1)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 1 December 2016.
‡ National team caps and goals correct as of 9 October 2009
|Revised Romanization||Seo Yong-deok|
Seo was leave a university without graduating joined Omiya Ardija in 2009. He made his debut for professional league on 18 July 2009 after coming on as a substitute at the 44th minute in Omiya Ardija's 0-3 lost at away to FC Tokyo. He was a member of the South Korea national U-20 team for the 2009 FIFA U-20 World Cup.
|Club performance||League||Cup||League Cup||Total|
|Japan||League||Emperor's Cup||J.League Cup||Total|
|2009||Omiya Ardija||J1 League||4||0||0||0||-||4||0|
|2011||Kataller Toyama||J2 League||29||1||1||0||-||30||1|
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