The Samsung Lions won the regular season and Korean series.

The franchises participating are divided into two regions: Eastern League (Samsung Lions, Doosan Bears, Lotte Giants, SK Wyverns) and Western League (Kia Tigers, Hanwha Eagles, LG Twins, Nexen Heroes).

The titles 'Eastern' and 'Western' do not directly correspond to the geographical regions of the franchises involved, as both SK and Doosan, being from Incheon and Seoul respectively, are clearly based in the Western region of Korea, despite representing the East.

Currently, the top four teams qualify for the postseason based on win–loss records.

The team with the best record gains a direct entry into the Korean Series, while the other three teams compete for the remaining place in a step-ladder playoff system: Any playoff games are no draw playing until the end, so originally scheduled 5 or 7 games.