Joined the American League as an expansion team to begin the 1969 season.
Left Seattle and relocated to Milwaukee to begin the 1970 season.
Moved to the National League in 1998 in order to faciliate MLB divisional realignment.
Left the National Association to become one of 8 founding clubs of the National League in 1876.
Left Boston and relocated to Milwaukee to begin the 1953 season.
Left Milwaukee and relocated to Atlanta to begin the 1966 season.
Franchise currently exists as the Atlanta Braves.