Field, teams & possession
- Seven defenders face six eligible offensive players; a center is required to snap the ball.
- Each possession starts at the 40-yard line and moves toward the end zone.
- First downs are earned at the 25-yard line and the 10-yard line.
- The offense has three downs to reach each first-down line.
- There are no running plays. A pass completed at or behind the line of scrimmage must gain positive yardage or the play is scored as a sack.











