Gap the equivalent of one ball length, it separates the offense and defense on the line of scrimmage and cannot be crossed before the snap.
left cornerback
Position at the far left of the main defensive line; this player is very fast and usually covers the opposing team’s wide receiver.
left safety
Position behind the main defensive line on the left side of the field; an excellent tackler, this player is often relied on to stop running plays.
left defensive end
Position on the outside of the left defensive tackle; this player pressures the quarterback and tries to stop the outside run.
middle linebacker
Position behind the main defensive line; this player combines speed and size especially to stop running plays in the center of the field.
right safety
Position behind the main defensive line on the right side of the field; this player is used mostly for the ability to cover passes.
outside linebacker
Position near or behind the main defensive line on the right side of the field; agile and versatile, this player is effective against running and passing plays.
right cornerback
Position at the far right of the main defensive line; this player is very fast and covers the opposing team’s wide receiver.
inside linebacker
Position near or behind the main defensive line on the left side of the field; agile and versatile, this player is effective against passing and running plays.
left defensive tackle
Position to the left of the middle linebacker; powerful and tough, this player is especially effective at stopping running plays.
right defensive tackle
Position to the right of the middle linebacker; powerful and tough, this player is especially effective at stopping running plays.
right defensive end
Position to the right of the right defensive tackle; this player pressures the quarterback and tries to stop outside runs.
