Do you need a QB spy in NFL Flag?
In NFL Flag you rarely need a QB spy, because the rulebook already does the job: the quarterback may not run the ball across the line of scrimmage, so there is no run to account for. What a spy is still worth here is shortening the drift, since he may move about behind the line indefinitely. Think of it as a patient rusher rather than as a defender assigned to a runner.
Your LB ends up here. It is the instinctive place to go and it is the wrong one, which is why this keeps happening to teams who are trying hard.
When rushing is the right call in NFL Flag
The rule has already spied him for you
Section X rule 2 forbids the quarterback from carrying the ball past the line, and defines the quarterback as whoever receives the snap so a direct snap does not evade it. The thing a spy exists to prevent in every other format is simply not legal here, which is why this page recommends against the call more often than it recommends it.
What is left is the drift, and that is a smaller problem
He may retreat and run sideways as much as he likes, because a sack is his flags pulled behind the line. A spy standing at the line shortens how far that drift can usefully go, which buys your coverage a second. It is worth something, and it is worth much less than a run.
The defender you spend was probably covering the centre
In this format the centre snaps and releases on a real route, and your underneath defenders are the natural spies. Assigning a spy without re-assigning the centre creates the single most common uncovered receiver in NFL Flag.
One defender whose only job is the quarterback
He ignores every route, every fake and every receiver, and watches one player. It is the simplest assignment on the defense to explain and the hardest to obey, because the ball going somewhere else is exactly when a young player wants to go and help.
A spy is a rusher who waits, and it usually beats one who charges
Both cost you the same defender. The rusher gives up the quick throw and often runs past the problem; the spy concedes nothing until the quarterback commits, and then arrives with the quarterback running toward him rather than away. Against an athlete, waiting is the better version of the same idea.
It is the answer to a specific opponent, not a standing call
You spy because their quarterback is their best runner. Against a team whose quarterback stands and throws, a spy is a defender doing nothing, and you should take the call off rather than leaving it on because it worked last week.
Where he actually has to be
Same 5 defenders, same alignment. One job changes.
- The instinctWrongNFL Flag: the LB takes the instinctive path.
Where a young defender goes when nobody has told him otherwise.
- The jobRightNFL Flag: the LB takes his actual landmark.
Where the job is. Say it out loud before the snap and most of this page stops being a problem.
This is the landmark. Give it a name your players can repeat back to you. A spot with a name gets occupied; a spot described in a sentence does not.
Three ways to handle a mobile NFL Flag quarterback, and the cost
Do not spy, cover everybody
Where it excelsFive on four against a quarterback who is not allowed to run. This is the most comfortable coverage arithmetic in any format on this site and there is usually no reason to give it up.
Exposed · the combinationA quarterback with unlimited time works the whole progression, and this format's combination concepts are drawn to keep working against coverage that does not move. You lose gradually.
Spy him at the line
Where it excelsShortens the drift and shortens the play, which is what your four-on-four coverage is short of. He commits only when the quarterback does, so nothing is conceded early.
Exposed · the middle underneathOne fewer defender in the middle, which is exactly where this format's shallow crossing routes live. The spy is standing near them and covering none of them.
Rush instead, from seven yards
Where it excelsInside a no-run zone, where the offense must throw and the field is short, an actual rusher applies real pressure on a play you have already diagnosed.
Exposed · deepOutside those zones he arrives after the ball has gone, and you have spent a defender chasing a quarterback who was never going to run anywhere that mattered.
Do not spy. Cover the centre instead
The rule has removed the problem a spy solves, so the defender is worth more doing something else, and the something else is the eligible centre that defenses from other formats leave alone. Keep the spy in your pocket for a quarterback whose drift is genuinely buying his receivers time, and take it back out the moment it is not.
The numbers behind the decision
He scrambles around for six seconds every play
That is a coverage problem dressed as a quarterback problem. Adding a spy takes a body out of the coverage that is already struggling to last. Fix the covering first and the scrambles stop mattering.
They try a direct snap to a back
It changes nothing. The rule defines the quarterback as whoever receives the snap, so that back inherits the ban on crossing the line. Play it as a pass and do not send anybody chasing.
When not to rush
When the spy cannot actually catch him
A spy who is slower than the quarterback is a spectator with a good view. Pick the player who can match him, which is often not the player you can most easily spare, and accept that this call has a real cost in coverage.
When they throw it every down
A defender watching a quarterback who never runs is a defender you are not using. This is the easiest call on the shelf to leave on too long, because nothing bad visibly happens while it quietly costs you a man on every snap.
Take it to your team
Draw your plays in the football play designer, collect them in the football playbook maker, and print wristband play cards so every player knows them come Saturday.
Draw it for your own team
Open the designer at NFL Flag, put your defenders where this page says, and print it so everybody shows up on Saturday knowing the same thing.
Open the free play designerRelated questions
Do you need a QB spy in NFL Flag?
Can an NFL Flag quarterback scramble?
What is the most commonly uncovered player in NFL Flag?
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Coach Ray Carroll
Coaches 5v5 flag football from kindergarten through 7th grade in San Mateo and San Carlos, California, and built RC Football to design, teach and print the plays his own teams run.