The Yankees have a fan base in Virginia, North Carolina, and Louisiana.
The Giants are big in Northern California.
The Cardinals' territory extends into Arkansas and west Tennessee.
The Tigers' fans are about exclusively in Michigan, and the Brewers' fans are all in Wisconsin.
New England is solidly behind the Red Sox.
The Mariners' area is Washington, part of Oregon and Alaska, and the northern part of Idaho.
The South is solidly behind the Braves.