Playbooks
At a Glance
Overview
Under 4t is a defensive set inside the 3-4 formation, and that distinction matters because it swaps the standard 3-4 personnel for a Base 5-2 grouping with a true nose tackle shading the strong side A gap. Instead of the two even 3-4 ends and stand-up rushers you get in the base sets, Under 4t slides the front so a four technique sits head up on the tackle, which compresses the interior and forces offenses to reach block on the backside. The linebacker depth in this set is also different from the standard 3-4 alignments: the inside pair plays tighter to the line of scrimmage, which is why the blitz-heavy calls here (Pinch Buck 0, Dbl Safety Blitz, Saw Blitz 1) come home faster than the same concepts from a nickel look.
Strengths
- Base 5-2 personnel with the nose tackle gives you legitimate run stopping power on the goal line and in short yardage without checking out of the formation, so you can defend 21 and 22 personnel runs while still keeping Cover 3 Sky and Cover 4 Quarters in the call sheet.
- The blitz package is deep and varied: Pinch Buck 0, Weak Blitz 1, Weak Blitz 3, Saw Blitz 1, Mlb Cross Fire 3, and Dbl Safety Blitz all attack from different gaps out of an identical pre-snap shell, which makes your looks hard to read.
- Cover 2 Invert and Cover 2 Invert Hard Flat drop safeties into the flats and rotate linebackers to the deep halves, an inverted look that punishes users who read the pre-snap safety depth and throw comeback and out routes into what they assume is soft zone.
- Cov 1 QB Contain Spy and Cover 1 Hole WK give you two separate answers to scrambling quarterbacks: one keeps a rusher home in the pocket, the other seals the middle window on drag and dig combos underneath man coverage.
- Cover 6 and Cover 3 Match let you play pattern-match rules from a heavy front, so you are not forced into pure spot drop zone when the offense goes empty or trips out of a run look.
Weaknesses
- Base 5-2 personnel means slow linebackers and a nose tackle on the field against spread sets, so any offense that motions to empty or four wide will isolate your inside linebackers on slot receivers and win with option routes and choice routes every snap.
- The heavy front leaves you light in the secondary, and Cover 3 Hard Flat plus Cover 2 Invert Hard Flat both squeeze the flats hard, which opens the seam and the deep hook window behind the flat defender for corner routes and bender concepts.
- Pinch Buck 0 and Dbl Safety Blitz remove all deep help, so a single free release on a slot streak or a quick hot route corner beats you for a touchdown if the rush does not get home in three seconds.
- Play-action rollouts and RPOs stress this set badly because your linebackers are aligned tight to the line and will bite on the run read, leaving the intermediate middle wide open on glance and slant tags.
- Opponents who identify the four technique alignment will run away from the nose tackle with outside zone and stretch concepts, and your backside end is often too slow to chase down the perimeter run from that front.
Usage Tips
Live in this set on second and short, third and one, and inside the five yard line, then check to nickel or dime the moment the offense shows three or more receivers to a side, because Base 5-2 cannot survive an empty formation.
Use Cover 2 Invert and Cover 2 Invert Hard Flat as your disguise pair: they present the same two high shell as Cover 4 Quarters and Cover 6, so alternate between them to keep the opponent guessing on whether the flat is squeezed or the deep half is rotated.
User the free safety or one of the inside linebackers on every Cover 1 call here (Cover 1 FS Fire, Cover 1 Robber Press, Cover 1 Hole WK) because the AI linebackers in this personnel will lose crossers, and manual coverage over the middle is your only reliable answer.
Rotate your blitzes rather than spamning one: pair Weak Blitz 1 and Weak Blitz 3 so the same weak side pressure shows up with man behind it one snap and three deep the next, which stops opponents from just hot routing a back to block the same gap.
Press coverage on Cover 1 Robber Press to disrupt timing routes, but back off and play Cover 3 Match or Cover 6 against a motion heavy offense, since pattern matching handles switch releases and trips concepts far better than pure man from this front.
