The 2011 St. Louis Cardinals
Odds: 999-1 to win the World Series
There were 15 games left to play in the 2011 MLB season. St. Louis was 4.5 games behind the Braves for the National League wild card spot. Vegas set the odds for St. Louis to win it all at 999 to 1. The Cardinals went 11-4, made the playoffs and beat the Texas Rangers to win the World Series.
3 gazillion to 1