In gridiron football, motion refers to the movement of an offensive player at or prior to the snap.

Generally, a field for gridiron football or soccer can be used.

A screen pass is a type of play in gridiron football.

Professional football is considered the highest level of competition in gridiron football.

In gridiron football, a play is considered to be dead if a ball or the player carrying the ball goes out of bounds.

In gridiron football, the red zone is the area of the field between the 20-yard line and the goal line.

This can be done either by running with the ball or by a rule unique to gridiron football known as the forward pass.

In gridiron football, the neutral zone is an area in which no member of either team may be, other than the person holding the ball.

In gridiron football, "hard count" is a strategy used by offenses, often to convert on fourth down with less than five yards to go.

In gridiron football, a field goal is always worth three points.