Pick one franchise. Every player on your roster must have played at least one game for your franchise during his career, but you can only use seasons in which he does NOT play for your selected franchise. Use seasons 1920-2015 only. However, if a player played for your franchise before 1920, you can still use a 1920+ season of his (as long as he plays for a different franchise). Use a ballpark your franchise called home at some point between 1920-2015.
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