The Baltimore Terrapins were one of the most successful teams in the short-lived Federal League of professional baseball from 1914 to 1915, but their brief existence led to litigation that led to an important legal precedent in baseball. The team played its home games at Terrapin Park.

The Federal League of Base Ball Clubs, known simply as the Federal League, was an American professional baseball league that played its first season as a minor league in 1913 and operated as a "third major league", in competition with the established National and American Leagues, from 1914 to 1915.