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FOUR SEAM FASTBALL.. held across the seams such that the batter sees four seams for every single rotation of the ball . The path of the four seamer is straight and if thrown with enough velocity tends to at least appear as though it rises on the flight to the plate. Throwing the four seamer with less than straight over the top delivery tends to add movement to the ball. The spin of the ball rotates 6 to 12 .

Four Seam Fastball: