K리그 챔피언십
In 2010, FC Seoul beat Jeonbuk Hyundai Motors at Posco Cup 2010 final match and became the Posco Cup 2010 Winner. FC Seoul were crowned K League champions as a 2–1 win over Jeju United in the second leg of the play-off series final saw them triumph 4–3 on aggregate in K League Championship Final. Also, FC Seoul recorded 56,759 spectators in K League Championship 2nd leg; this became the K League Championship's new highest attendance record.