Yoo Byung Soo's career looks alright. Scored a ton of goals (37 in 67 games) between 2009 and 2011 in the K-League, moved to Saudi Arabia where he carried on his form, then went to Russia with Rostov in 2013 but only played 28 times and scored three goals in three seasons.
Been playing in the South Korean fourth division (!) since 2017. Three caps for South Korea won in 2010 and 2011