Facebook released a county-by-county fan map for MLB's Opening Day.
It's based on Facebook likes, and it's filled with a bunch of interesting tidbits. One of the biggest takeaways: There's a hard border between Red Sox fans and Yankees fans in central Connecticut.
The three westernmost Connecticut counties - Litchfield, Fairfield, and New Haven - are Yankees country.
The six easternmost Connecticut counties - Hartford, Middlesex, Tolland, New London, and Windham - are Red Sox country.
It's a stark division:
The entire map. Notice how there are pockets of Yankees fans all over the country:
