The 2009 Thai League Division 1 has 16 teams.
Bangkok Bank FC were relegated from the Thailand Premier League, but withdrew from the league and folded before the season began. The Thai FA decided that, in order to keep the league at 16 teams, they would run a pre-season competition featuring the four relegated clubs from the Thailand Division 1 League 2008 season: Thai Honda won the competition.
The winners of the Pre Season Playoff would fill the void left by Bangkok Bank FC, after they withdrew from the league after being relegated from the Thailand Premier League.
The four semi finalist's in the play-offs, are the four relegated clubs from the 2008 season of the Thailand Division 1 League.
Last updated October 17, 2009