The Bases and Foul Lines: 1878–1879: National League of Professional Base Ball Clubs
Baseball history diagram: Bases and Foul Lines: 1878–1879: National League of Professional Base Ball Clubs. Beginning in 1878, the Foul Ball Lines were required to be marked on the playing field to each Foul Ball Post, from Home Base. The Foul Ball Lines also extended to the fence erected behind Home Base. Generally the flag attached to each post contained the colors of the home club. Click diagram to return to previous page.