On June 14, 1990, the National League announces that it will expand by two teams â increasing its membership from 12 to 14 â beginning in 1993. The National League will add the Colorado Rockies and the Florida Marlins to its roster of teams.

On June 14, 1990, the National League announces that it will expand by two teams â increasing its membership from 12 to 14 â beginning in 1993. The National League will add the Colorado Rockies and the Florida Marlins to its roster of teams.
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