The I-Formation is a football offensive formation characterized by a straight line of players, with the quarterback positioned behind the center and a fullback directly behind the quarterback. This setup allows for a balanced attack, enabling both running and passing plays. The fullback can block for the running back or serve as a ball carrier. In the I-Formation, the running back is positioned behind the fullback, creating a "I" shape when viewed from the side. This formation is effective for short-yardage situations and is commonly used by teams like the New England Patriots and Dallas Cowboys to establish a strong ground game.