The map to the left shows the location of all 30 Major League Baseball teams. The American League has 14 teams; a result of Milwaukee's defection to the National League--giving the latter an obvious 16 teams. Since I like to talk baseball, over the course of many years I have met and engaged with baseball fans from about every Major League organization. I have found that fans have varied reasons to why they choose to cheer and support their team. Most choose to support a team simply because that is where they grew up, and they have history with that ball club. Some support teams because their favorite players are on the roster. And many choose to support a team because of the gained identity and instant camaraderie associated with being for the Giants versus the Athletics, or the Yankees versus the Mets.
Choosing what team to support in any sport is a very calculated decision. There are often deep underlying reasons to why an individual chooses one team over another. But to understand the concept of what I will call the team selection phenomenon, it is requisite that we first have an understanding of American geography and its relation to fan base. The map below displays the 30 ball clubs, not limited to their respective cities, as in the map above, but as territories, or countries.

This map accurately illustrates the baseball demographic in the United States. In some areas you can see that it's a matter of identity preference as opposed to mere locality. As is the case in parts of Los Angeles, San Francisco, Chicago, and New York City. In San Francisco for example, Giants fans are sometimes labeled as "white collar", while A's fans are labeled as "blue collar." This identity is in part due to the locale of the two ballparks, but mostly because of the image the team has take on over time. If you are vigilant, you will notice that some fans align themselves with certain teams because it fits their personality or it provides them with a desired identity. Next time you get together with friends, ask them why they support their particular team. You may learn a lot about them.

