What is illegal formation on offense?
Emily Ross
Published Jan 23, 2026
An illegal formation is a penalty that is called against the offense for failing to line up prior to the snap according to specific guidelines.
What is illegal formation penalty in the NFL?
Penalty: For illegal formation by the offense: Loss of five yards.
What is offense formation?
On offense, the formation must include at least seven players on the line of scrimmage, including a center to start the play by snapping the ball. There are no restrictions on the arrangement of defensive players, and, as such, the number of defensive players on the line of scrimmage varies by formation.
Is illegal formation a loss of down?
If the formation is illegal, the officials will throw the flag at the beginning of the play and regardless of what happens on the play, a five-yard penalty will be assessed to the offending team and include a replay of the down.
What is an illegal defense in the NFL?
ILLEGAL FORMATION: The defense cannot have more than six players on the line of scrimmage on either side of the snapper during kicking plays. This rule is designed to protect players who are in a vulnerable position. Violations of this rule will result in a five-yard penalty.
22 related questions foundWhat is an illegal shift?
The National Football League defines all motion and shift penalties as "illegal motion", while both the NCAA and NFHSAA make a distinction between an "illegal shift" and "illegal motion"; an illegal shift refers to players shifting and not coming to a complete stop before the snap, while illegal motion refers to a ...
Is illegal formation a dead ball foul?
Re: Illegal Formation or Illegal Motion? The only offensive procedure penalty that kills the play is a false start or an illegal snap, which are fouls prior to the snap thus the ball remains dead. Everything else is a foul at the snap after/as the ball becomes live -- and no foul causes the live ball to become dead.
What is the line of scrimmage and what is its purpose?
In gridiron football, a line of scrimmage is an imaginary transverse line (across the width of the field) beyond which a team cannot cross until the next play has begun. Its location is based on the spot where the ball is placed after the end of the most recent play and following the assessment of any penalty yards.
What are legal football formations?
A formation in football refers to the position players line up in before the start of a down. There are both offensive and defensive formations and there are many formations in both categories. Sometimes, formations are referred to as packages.
Was the Philly special illegal formation?
Yup, Philly Special shouldn't have been allowed to go for a touchdown. It was an illegal formation according to our favorite former NFL official. Essentially Alshon Jeffrey was lined up two yards off the line of scrimmage. That means the Eagles didn't have enough players on the line of scrimmage on a tick play.
What is the most common offensive formation?
Shotgun. The shotgun formation is the most popular offensive formation in the modern game. It allows the quarterback to get right into a passing play, as well as run the increasingly-popular zone read running offense. This is the most common type of spread offense.
What is an illegal formation in football?
An illegal formation is a penalty that is called against the offense for failing to line up prior to the snap according to specific guidelines.
What are the 5 defensive formations?
As the offense will line up in the “I-formation” or the “Wing-T,” defensive formations contain numbers that typically identify the defensive lineman and the linebackers.
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These are the most common defensive formations:
- 3-4.
- 4-3.
- 4-4.
- 5-2.
- 6-2.
Can lineman be downfield on a screen pass?
The NFL only gives offensive linemen one yard downfield before a pass.
What is considered on the line of scrimmage?
To be on the line, a player does not have to be lined up directly over the ball. In fact, he can be even up to a yard behind the ball and still be considered on the line. By rule, to be “on the line of scrimmage,” a player's head has to break the line drawn through the waistline (NCAA) or beltline (NFL) of the snapper.
Where does scrimmage come from?
Originally, scrimmage was a variation on the word skirmish, and meant "a confused struggle between players."
What is behind the line of scrimmage?
Former collegiate star, sports agent, and NFL Executive Michael Huyghue recounts his journey in professional sports and shows how race and racism operate among the rich and the white and extend way beyond the NFL and the world of sports executives.
What is the difference between illegal shift and illegal motion?
An illegal shift occurs when the team snaps the ball after failing to hold their positions for a full second after the shift occurred. An Illegal motion occurs when a single player that is in motion is either moving towards the line when the ball is snapped.
Does an illegal shift stop the play?
It is also an illegal shift if a player under or behind center goes in motion and fails to come to a complete stop for at least one full second before a second player goes in motion. Note: The offensive team must present a legal formation both before and after a shift. Penalty: For an illegal shift: Loss of five yards.
Does illegal motion stop the play?
Illegal motion is a penalty in football called against offensive players who are in motion toward the line of scrimmage during the snap. This rule prevents offensive players from getting a running start by moving toward the line of scrimmage as the play starts.
Why is illegal shift a penalty?
An illegal shift penalty will be called if the ball is snapped and a player fails to come completely set following a shift. For example, a tight end and a wide receiver shift from one side of the center to the other. Before both players are in a set position for at least one second the quarterback hikes the ball.
What is the difference between false start and illegal procedure?
False Start is simulating the start of the play. A back that suddenly lurches or stumbles forward has false started no matter how much he tries to make it look like he was just going in motion. Illegal Shift is when more than one player moves/shifts at the same time and they don't all set before the snap.
What is the rule for illegal forward pass?
An illegal forward pass is one that is made either in front of the line of scrimmage or after another forward pass has already been completed. This penalty, on the offense, will negate any play that occurs after the pass, if the penalty is accepted.
What is the 46 formation?
The 46 defense is an American football defensive formation, an eight men in the box defense, with six players along the line of scrimmage. There are two players at linebacker depth playing linebacker technique, and then three defensive backs.
What are defensive formations?
DEFENSE. There are three basic levels to a defensive formation: the line, linebackers and the secondary. Variations to defensive formations come in the number and combinations of players at each of these levels. Traditionally, defensive formations are named according to the number of down linemen and linebackers.