to higher-level targets. Backside blocking of defensive tackles for pulling guards. In some offensive schemes, certain plays will involve "pulling" an offensive lineman to block for the ball carrier. If a guard needs to pull for a block, the center will typically block the defensive tackle in order to fill the guard's void. Pass blocking Pass blocking is similar to run blocking for a center. The center will initially help guards based on the position of the defensive linemen. In the case of a blitz, the center may need to pick up a rushing linebacker, safety or corner. A good center also needs to stay vigilant during pass blocking to protect against defensive stunts and twists. During the play On most plays, the center will snap the ball directly into the quarterback's hands. In a shotgun formation, the center snaps the ball to the quarterback lined up several yards behind him. In punt and field goal formations, the center also snaps the ball several yards behind him to the punter or holder on the field goal unit. Because bad snaps can ruin special teams plays and cause turnovers, most teams have a center who is specifically trained for snapping the ball in punt and field goal formations. This player is referred to as the team's long snapper. Also, the center does not have to snap the ball to the quarterback, holder, or punter. He is allowed to snap the ball to anyone behind him. Because of this, some plays involve snaps directly to running backs instead of the player generally expected to receive the snap, hoping to fool the defense. In slang, the player receiving the snap is said to be "under center" if he receives the ball directly from the center (not in shotgun). This phrase is typically applied to quarterbacks but has been used in reference to other positions as well. Special teams On all special teams formations, the center is a long snapper. Today, all NFL teams have a dedicated long snapper. Drawing penalties Although the quarterback commands the ball, it is the center's snap that renders the ball in play; the defensive line may not cross the line of scrimmage until the center snaps the football. An astute center can help draw an opposing team offside prior to the snap or potentially trick the other team into a penalty by quickly snapping the ball while the