Spoiler alert! The Red Sox will be on this list.
I was at the Jays 2008 home opener when we hosted Boston. It was difficult to concentrate on the game with all the Sox fans screaming in broken English, yelling nonsense like "wicked pissah' and "hoobangah".
If that wasn't bad enough, as the Jays pulled away the drunker of the Sox fans started to pick fights in the stands.
Although in their defense, Canadian beer actually contains alcohol.
So without further ado, here is a list of the most hostile fans in baseball.