Formation (American football)

Position players line up in before the start of a down in American football A formation in American football refers to the position players line up in before the start of a down. There are both offensive and defensive formations and many in both categories. Sometimes, formations are referred to as packages. Offense At the highest level of play in the NFL and NCAA, the one constant in all formations is the offensive line, consisting of the left and right tackle, left and right guard, and a center. These five positions are often referred to collectively as the "line", and have the primary role of blocking. By rule, there must be two additional players on the line of scrimmage called ends. These players are eligible receivers and may play near the linemen (tight ends) or further away (split end or wide receiver). Most teams play additional players near (but still off) the line of scrimmage to act as extra pass receivers. Offensive positions Up to four players can be behind the offensive line, but one is always designated the quarterback (defined as the player who receives the ball from the center). Upon the snap of the ball, the quarterback becomes the ball carrier. The ball carrier h