Cover 0 Has No Help, and That Is the Entire Point
The E13 cheat card teaches Cover 0 as man coverage with nobody deep. That is right, and it is enough to make you hurry.
What the card cannot fit is why a coordinator would ever do that on purpose. No defense gives up the deep middle by accident. Cover 0 trades every ounce of safety help for something specific, and if you know what they bought, you know what to sell them.
What the defense actually bought
Cover 0 is man coverage across the board with zero deep safety help, attached to a heavy blitz. Matt Bowen describes the pressure that comes with it as a six-man blitz used on early downs.
The purchase is a forced decision. Against a seven-man protection, one dependable way a defense forces a hot throw is to send a secondary defender, and once that defender is rushing, there is nobody left to play deep. So the blitz and the empty deep middle are not two choices. They are one choice with two halves.
Read that in reverse and you have a pre-snap tell. If the defense wants you throwing hot right now, they have to show you this. The absence of a deep safety is not a mistake they are hiding. It is the receipt.
The leverage law, and the best sentence in the coverage
Every defender in Cover 0 plays from an inside shade, the inside eye of the receiver, without any safety help in the middle of the field. That is the exact opposite of Cover 1, where corners shade outside because there is a safety inside to funnel you toward.
Coaches teach it with a question and an answer. Where is your help? The sideline.
That is the whole coverage in two words. The defenders are pushing you outside on purpose, and they are willing to live with what happens out there because the boundary does the work a safety would normally do. Inside-breaking routes, the slants and digs and crossers that beat everything else, are the routes Cover 0 is specifically built to take away.
Alignment depth is a variable rather than a constant here, and the sources disagree. Bowen implies press alignment on the pressure. Throw Deep describes defensive backs at eight yards with an inside shade, driving downhill. Both agree on the inside shade. Treat depth as something you read on the day and leverage as the rule.
What it looks like at the line
Published installs put defensive backs at eight yards with that inside shade, driving downhill on the throw. Bowen's version of the pressure is a six man blitz used on early downs, with press alignment implied rather than stated.
Underneath, the assignments split cleanly. Corners take the outside receiver with no run responsibility. Safeties are either in the blitz or in man on the second and third receivers. Nickel and outside linebackers have outside contain in the run fit plus a blitz or a man assignment. Middle linebackers have the inside gap, the back in coverage, or a plug assignment designed to obstruct hot routes before they start.
That last job is the one to notice. A defense that sends everybody still assigns somebody to get in the way of your hot answer, because the hot answer is the whole reason you survive this call.
Where the ball goes
One beaten defender is a touchdown. That is the structural cost, and it never goes away.
The cheaper answers come first. Screens and quick outlets attack the grass the rushers just vacated. Every defender in this coverage has to be a sure tackler in space, because there is nobody behind him to clean anything up, and a missed tackle on a five yard throw is not a five yard play.
Then there is the leverage answer. If everyone is inside shaded and the help is the sideline, the routes that break away from that shade are the ones the coverage is least prepared for. Out breaking routes, fades, anything that uses the boundary the defense is counting on as a teammate.
Why you will see it in short yardage
Cover 0 puts the maximum number of bodies near the line, which is exactly what a defense wants on third and one and at the goal line. The field is already short, so the deep help it gives up is help the offense could not have used anyway.
This is worth internalizing as a situational tell. The same look that is a gamble at midfield is close to free inside the five, because there is no deep middle left to defend. When the field shrinks, the coverage that has no answer for deep routes stops having a weakness.
What to do with this on Saturday
The E13 drill still stands. See no deep safety, know your clock just got short, get the ball out.
This is the next rung:
Count the rushers, then find the hot route the pressure created. They sent an extra man specifically to make you throw hot. Know which receiver that is before the snap, because you will not have time to find him after it.
Check every defender's shade. Inside eyes across the board confirms it. Once you know they are all pushing you out, you know which half of your route tree is live.
Remember the help is the sideline. That is not a slogan, it is a coverage instruction you can hear. Anything working back toward the boundary is working toward their teammate.
Have the outlet ready. Screens and quick outlets are named directly in the published beaters, so this is the designed answer rather than a scramble.
Cover 0 is not a defense with a hole in it. It is a trade, made on purpose, and the coordinator already decided the deep middle was worth whatever he bought with it.
The E13 cheat card gets you seeing the empty middle. This gets you seeing the trade. Drill both in Defense IQ until the read arrives before the thought does.
The lesson this goes with: E13 in the Film Room, where the free cheat card lives.
Where this comes from
Every claim above is checkable. These are the published sources behind it, and where they disagree the article says so.