These baseball clubs were members of the National Association of Base Ball Players, which governed baseball through 1870. (See Marshall Wright (2000). The National Association of Base Ball Players, 1857-1870. Jefferson, NC: McFarland & Co. ISBN  0-7864-0779-4)

All articles/pages on member clubs should be here. Many ballclubs were members of both the NABBP and the subsequent professional Association, the NAPBBP or NA for short. Articles on those clubs, listed here, tend to focus on the later so-called major league seasons; indeed, some may say nothing at all about the club before 1871.