Cover 3 Zone (7v7 flag football defense)
Also called the 1-3-3 zone or 3-deep zone. Coaches name the same defense different ways, so the name your league uses may not match ours.
Three defenders split the deep field into thirds, three more guard the short area from sideline to sideline, and one rusher chases the quarterback. It is the most common base zone in 7 on 7 because it keeps the big play in front of you and still has enough short defenders to rally to quick throws.
This diagram shows a pressure version. The NFL FLAG standard rulebook prohibits rushing the passer in regular-season 6U, 7U, 8U and grade-based divisions; tournament rules differ. Use the written no-rush assignments when supplied, or choose a rehearsed no-rush defense. Verify your league's adopted rules before using a rush arrow.
Each defender's job
- RURusher. Start at least 7 yards off the ball with a hand raised and go for the quarterback's flag. Watch for a handoff to R and pull that flag instead if the ball goes there.
- LBGuards the short left side, the curl and flat area from the sideline in to the hash. Stay under Y and X's short routes and come up on any run or screen to the left.
- MGuards the hook area in the middle, 4 to 8 yards deep, right in front of the center. Take away C and any in-route across the middle.
- NBGuards the short right side, the same job as LB. H and Z are your side, so sink under their short routes.
- LCGuards the deep left third. Drop at the snap and stay deeper than X and Y.
- FSFree safety. Guards the deep middle third. Nobody gets behind you, and you help on any deep throw toward either side.
- RCGuards the deep right third. Drop at the snap and stay deeper than H and Z.
Where each defender lines up
Read from the diagram above, against Doubles Gun. Depths are starting points; move a defender a yard or two to fit your field and your players.
| Defender | Starts | At the snap |
|---|---|---|
| RU | 8.5 yards off the ball, right of middle, across from H | Rushes the passer, where the division allows a rush |
| LB | 4.5 yards off the ball, left, across from Y | Holds the short zone at this depth |
| M | 4.5 yards off the ball, middle, across from C | Holds the short zone at this depth |
| NB | 4.5 yards off the ball, right, across from H | Holds the short zone at this depth |
| LC | 9.5 yards off the ball, left, across from X | Drops to about 12 yards deep |
| FS | 10 yards off the ball, middle, across from C | Drops to about 13 yards deep |
| RC | 9.5 yards off the ball, right, across from H | Drops to about 12 yards deep |
When to use the Cover 3 Zone
Use it as your base 7 on 7 defense, against teams that like to throw deep, and any time you are not sure what the offense does yet. This version has one rusher starting 7 yards back. Many 7 on 7 leagues use a pass clock and no rush at all, so check your league's rules.
Strengths
- Three deep defenders make the long pass very hard.
- Three short defenders cover the whole width, so quick throws are met by a defender right away.
- Every player has a clear area, and the same rules work against any formation.
Weaknesses
- Four receivers going deep outnumber the three deep defenders.
- The seams, the lanes between a deep third and the middle third, stretch the deep defenders apart.
- The area just behind the short defenders, 10 to 14 yards deep over the middle, is hard to cover when the free safety is pulled away.
How offenses beat it
These plays from our playbook attack the soft spots of the Cover 3 Zone. Run them against your own defense in practice so your players learn what it looks like.
Four receivers run deep against three deep defenders. The free safety cannot cover both inside verticals, so one of them is open in the seam.
H runs the seam and pulls the deep middle defender, and Z runs a 12-yard dig right behind the hook defender into the space that is left.
Two in-routes break into the middle at about 10 and 5 yards. The hook defender can take only one depth, so Q reads that defender and throws to the other route in front of the deep thirds.
More like these: every play we list against zone defense. Compare this with the other 7 on 7 flag football defenses.
Coaching points
- Teach the deep defenders to backpedal until the QB throws, then break on the ball. Staying deep is the whole job.
- The short defenders should sink to about 8 yards and read the quarterback. When the QB winds up, drive toward the throw.
- When two receivers run deep up one seam and one sideline, the deep defender on that side takes the outside one and the free safety takes the inside one. Walk through this in practice.
- Everyone runs to the ball after the catch. A short catch should stay a short catch.
Practice the seams between deep thirds
Send two receivers vertically near adjacent deep zones. Have the deep defenders call the routes and keep enough depth to protect the space behind them. The short defenders should recognize receivers moving through their areas instead of watching the quarterback alone. Freeze the rep before the throw to see who owns each threat.
Test the defense against short and deep calls
Use Four Verticals for the deep spacing test, then Double In for the underneath windows. Change the offense while keeping the defense in the same alignment. That shows whether the players understand their areas or have simply memorized the last route they saw.
Common mistakes
- A short defender follows a receiver deep and leaves a hole underneath. Pass deep receivers off to the deep third.
- The free safety guesses and jumps a route early, leaving the deep middle open.
- The rusher ignores the back and a quick handoff goes right past.
Adjustments when the offense attacks it
- If four verticals keeps working, move the hook defender back to guard the deep middle on long-yardage downs, which gives you four deep defenders.
- If Dagger or deep in-routes hurt you, tell the hook defender to sink deeper, to about 10 yards, when a receiver runs straight up the seam.
- If the offense completes quick outs, have LB and NB widen toward the sidelines before the snap.
How to adjust the Cover 3 Zone against common offensive looks
Teach the base assignments first. Add one of these adjustments at a time, and only after the offense shows you the look more than once.
- Four receivers going deep
- Three deep defenders cannot cover four deep routes. On long-yardage downs, move the hook defender M back to guard the deep middle, which gives you four deep. Go back to three short defenders once the offense needs fewer yards.
- Trips, three receivers to one side
- Slide M toward the three receivers so two short defenders sit under them. The deep third defender on that side stays deeper than the deepest route, and the free safety shades that way without leaving the middle.
- Quick outs and flat throws
- Have LB and NB line up wider, closer to the sidelines, before the snap. M then has more of the short middle to guard, so move them back in if in-routes start to hurt.
- Deep in-routes behind the short defenders
- When a receiver runs straight up the seam, the hook defender sinks to about 10 yards instead of sitting at 5. That closes the space in front of the free safety where a dig is thrown.
- A back releasing to the flat
- LB or NB, whichever is on that side, takes the back in the flat once the outside receiver has gone deep. If the back takes a handoff, the rusher goes for that flag.
- Leagues with no rush
- The rusher becomes a fourth short defender. Split the short area into four lanes instead of three, the same way the 1-4-2 does, and keep all three deep defenders where they are.
Drills that teach the Cover 3 Zone
- Zone Drop and Break Drill (8 min): Three defenders reach their zone landmarks, settle in balance and respond to the released pass.
- 7-Yard Rusher Drill (8 min): Where your division permits it, a designated rusher starts behind the 7-yard mark, leaves on the snap and approaches the passer under control.
- Sideline Flag Pull Drill (10 min): A ball carrier races for a two-cone gate on the sideline while a flag puller takes an angle to cut them off.
Cover 3 Zone FAQ
What is Cover 3 in 7 on 7 flag football?
Cover 3 is a zone with three deep defenders, each guarding one third of the deep field, three short defenders across the field, and one rusher. Coaches also call it a 1-3-3 or a 3-deep zone. The free safety has the deep middle and the two outside deep defenders have the sidelines.
How do you beat Cover 3 in 7 on 7?
Send four receivers deep against the three deep defenders, throw up the seams between the deep thirds, or throw a dig 10 to 14 yards deep over the middle behind the short defenders. Four Verticals, Dagger and Double In are the plays we diagram against it.
Who covers the flat in Cover 3?
The two outside short defenders, LB and NB in our diagram. Each guards the curl and flat area on one side, from the sideline in to the hash. If the offense keeps completing quick outs, line them up wider before the snap.
What does the free safety do in Cover 3?
The free safety guards the deep middle third, stays deeper than every receiver, and helps on a deep throw toward either side. The mistake to coach out is drifting toward one sideline early, which opens the seam on the other side.
Should I play Cover 3 or Cover 2 in 7 on 7?
Cover 3 puts a defender in the deep middle and keeps long passes in front of you, with three short defenders. Cover 2 has four short defenders and two deep, so it is tighter against quick throws but open up the middle seam. Many 7 on 7 teams use Cover 3 as the base call and change only when short passes keep working.
Other flag football defenses
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