[ 4th & Smart · A game-theory approach to fourth down ]
Fourth down has a tell.
One fourth-down unit that can punt or run offense from the same look. The defense has to pick its personnel before it knows which one is coming.
► Film room · 05:00
Five minutes on the unit and the math.
How the unit lines up, how it reads the defense's personnel, and what that is worth in expected points.
Film drops soon
REC ● 00:00 / 05:00
01[ Cold open ]
The punt team jogs on. Their return unit follows.
Fourth and 3 at our own 42. The punt team jogs on: a snapper, four linemen, two gunners split wide, a three-man shield, and the punter deep.
Everyone in the stadium knows what happens next.
That's the problem. The defense knew our call before the snap, and so did everyone watching. On fourth down, the most predictable team on the field is usually yours.
02[ The binary problem ]
You show your call the moment you send personnel.
Fourth down comes down to two choices: punt or go for it. The analytics debate is about which one to pick. The bigger problem is timing. Whatever we send, the defense matches it with no risk.
The bigger problem is timing. Whatever we send, the defense matches it with no risk.
PUNT
► We send: Punt team
► Their sideline
?
Waiting on you
► Their sideline
Return unit
✓ Read confirmed
GO
► We send: Offense
► Their sideline
?
Waiting on you
► Their sideline
Base / goal line
✓ Read confirmed
When the defense never has to guess, your fourth-down call leaves value on the table.
03[ The idea ]
4th & Smart
4th & Smart keeps the same two options: punt, or go for it. Go for it means a full menu of play calls, and one specially trained unit carries the punt and the whole menu. What changes is the order of events.
► Option A
Punt
STAYS LIVE ON EVERY SNAP
► Option B
Menu · 6 calls
Go for it
- 01Quick out
- 02Back flare
- 03Shot outside
- 04QB draw
- 05Counter
- 06Bunch run
► The usual order
► The 4th & Smart order
02
Defense matches
They see who ran on and send the unit that fits it.
01
Defense declares
They pick their personnel first.
01
We choose
We send the punt team or the offense.
02
We read
Our unit sees which personnel they sent.
03
We choose
Punt or go, with the formation and play that beat their personnel.
The defense no longer gets a free read. Now it has to guess, and every guess can be wrong.
04[ The unit ]
The same eleven stay on for every option.
The eleven
Five offensive linemen, two tight ends, two wide receivers, a backup quarterback, and a running back. The outside players are real receivers, not gunners.
We change formation, not personnel.
- 01LTLeft tackle
- 02LGLeft guard
- 03CCenter
- 04RGRight guard
- 05RTRight tackle
- 06TETight end
- 07TETight end
- 08WRWide receiver
- 09WRWide receiver
- 10QBBackup quarterback
- 11RBRunning back
05[ The tempo trigger ]
The defense gets about ten seconds.
01 Sprint on
On fourth down the unit sprints onto the field. It looks the same whether we punt or go.
They move first. We move last.
► ClockTime to declare
0:10
► Their call sheet
PUNT OR GO?
- Return unitDeep returner, vise outside
- Punt-safeNo true returner
- BaseStay in base defense
06[ Three looks, three answers ]
We read their personnel, then pick the play.
Our look
We line up in the punt shell. The QB and RB stand side by side about eight yards deep, and the center can snap to either one.
Deep returner means fake more.
► Defense declares
Return unit
1 RETURNER · 2 VISE
6 IN THE BOX · 2 LB
► We shift
Spread, set
1.0s SET
First down
07[ Why it works ]
Mix your actions so the opponent cannot profit by guessing.
Poker players call this game-theory-optimal play. On fourth down the defense picks its package first. We see it, then pick punt or go.
► GTO = no profitable guess
► One more edge from the rules
Our outside players are real receivers. A defender who treats them like gunners and holds them downfield is a target. If we throw while that contact continues, it is defensive pass interference, and a gain that big can change the drive.
pass interference
Our call →
Return unit
Deep returner, light box
Their edge
They get the return they set up.
Our edge
They can't stop our offense.
Punt-safe
No real returner
Our edge
Clean punt. No return, extra roll.
Their edge
Their defense is set for our offense.
Base
Stays in base
Our edge
Punt from normal spacing. They aren't set to return.
Live
Still live: a run from bunch behind two tight ends.
No package beats both options.
08[ Hidden costs ]
Hurried decisions cost the defense in two more ways.
► Penalties
Twelve men on the field, offside, neutral zone infractions. On fourth and three, five yards is a first down.
► Timeouts
To avoid a bad match-up, the defense often calls one. That timeout is gone when they need it at the end of the half.
Defense timeouts
ONE GONE BEFORE THE END OF THE HALF
Line to gain · 45
Ball · Own 42Ball · Own 47
+5 yards
= First down
- Flag 112 men on the field
- Flag 2Offside
- Flag 3Neutral zone infraction
09[ The first-mover edge ]
The first team to run 4th & Smart gets the biggest edge.
Their preparation will be weak at first. Early adopters collect the largest gains before the league catches up.
► Us
A full off-season of reps.
EVERY PLAY FAMILY · THE READ · ONE CALL
► Them
No film. No practice reps. No tested answers.
► Preparation for 4th & Smart
10[ What it's worth ]
Field position is points.
Move the opponent's start from the twenty-eight to the twelve, again and again, and you earn a steady dividend.
► Opponent's start
Their28
+1
► About
Expected point per punt, in good spots
Hidden yards, selective fakes, and the occasional pass interference flag, against units that haven't prepared for it.
+4
► Up to
Points per game
Four good chances a game gives up to four points.
+2
► Up to
More wins a season
Over a season, that can be two more wins.
11[ Close ]
Fourth and three. Our own forty-two.
► This time
The 4th & Smart unit sprints on in the punt shell.
► Their sideline
Return unit, punt-safe, or base? They have to pick first, and every pick can be wrong.