Mike Fast, an analyst who used to write for Baseball Prospectus but who is now employed by the Astros, put together a Google Map of the Astros organization -- the location of the team's minor league affiliates.
I liked the idea so much I spent a few minutes plotting the same thing for the Seattle Mariners and their minor league affiliates.
For a more complete view of the Mariners affiliates, visit the wikipedia entry on the topic (which includes a historic timeline of the changing affiliations) or the team's affiliates news page.
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