3-3-5 Stack
Stack alignment, five DBs, versatile blitz
- Front
- Linebacker
The 3-3-5 Stack uses three down linemen, three linebackers stacked directly behind them, and five defensive backs. The stacked alignment hides the linebackers behind the DL, making it nearly impossible for the offensive line to get a pre-snap read on who is rushing and who is dropping. This front thrives on deception, disguised blitzes, and versatility. It is built to combat spread offenses by matching personnel while maintaining the ability to generate pressure from any angle.
Assignments
6 PLAYERSNumbers match the keys on the field. Tap a player for his gap rules.
Strengths4
- Strength: Stacked alignment disguises all blitzes and makes protection calls nearly impossible
- Strength: Five DBs provide excellent coverage against spread formations and 3+ WR sets
- Strength: Versatile blitz packages can send pressure from any angle or gap
- Strength: Forces the offense to block reactively rather than with a pre-snap plan
Weaknesses4
- Weakness: Only three down linemen can be overpowered by strong run-blocking units
- Weakness: Linebackers are smaller and lighter to cover, making them vulnerable to power runs
- Weakness: Requires highly athletic linebackers who can both rush and cover
- Weakness: Gap integrity depends on post-snap reads, increasing the risk of missed assignments
Pairs well with
4History
Joe Lee Dunn pioneered the 3-3-5 Stack as a way to combat the emerging spread offense, most famously dropping a lineman for a defensive back in Memphis's 1991 upset of USC. He built his reputation on the front at Memphis (1991-95) and Mississippi State (1996-2002), where his 1999 defense led the nation. The scheme then spread through his disciples, Rocky Long, Jeff Casteel at West Virginia, and has grown increasingly popular in the NFL as offenses spread out with 11 personnel and three-receiver sets.
Run game vs the 3-3-5 Stack
7 RATED- Outside ZoneEdge
Only three down linemen make it difficult to set the edge; outside zone gets to the perimeter quickly.Show reasoning
Conflict defender. WILL (stacked behind the weak DE, edge force)
Why the offense wins. Only three down linemen make it difficult to set the edge; outside zone gets to the perimeter quickly.
Key adjustment. Have the stacked WILL spill the stretch and the safety fill from the secondary.
- CounterEdge
Athletic but light 3-3-5 defenders are susceptible to misdirection; counter action freezes linebackers and creates cutback lanes.Show reasoning
Conflict defender. WILL linebacker (counter action)
Why the offense wins. Athletic but light 3-3-5 defenders are susceptible to misdirection; counter action freezes linebackers and creates cutback lanes.
Key adjustment. LBs must read linemen pull direction and not the back to avoid biting on the misdirection.
- DuoEdge
Only three down linemen are easily overwhelmed by duo double-teams; the back runs downhill through vertical creases.Show reasoning
Conflict defender. Nose tackle (double-teamed)
Why the offense wins. Only three down linemen are easily overwhelmed by duo double-teams; the back runs downhill through vertical creases.
Key adjustment. Slant the nose away from the center and blitz a linebacker into the opposite A-gap.
- DrawEdge
Spread-based 3-3-5 defenders overcommit to pass rush; the draw exploits their upfield rush lanes.Show reasoning
Conflict defender. MIKE linebacker (pass-rush mode)
Why the offense wins. Spread-based 3-3-5 defenders overcommit to pass rush; the draw exploits their upfield rush lanes.
Key adjustment. Keep one linebacker in spy technique to read the draw.
- Inside ZoneToss-up
Three linebackers can scrape and fill all gaps with speed.Show reasoning
Conflict defender. MIKE linebacker (A-gap fill)
Why the offense wins. Only three down linemen can be overwhelmed by five zone blockers.
Why the defense wins. Three linebackers can scrape and fill all gaps with speed.
Key adjustment. Have the stacked linebackers scrape to the ball; three down linemen hold the gaps and the backers fill.
- PowerToss-up
Three athletic linebackers can flow and fill against the pull.Show reasoning
Conflict defender. WILL linebacker (cutback lane)
Why the offense wins. Only three down linemen can be moved at the point of attack by power blocking.
Why the defense wins. Three athletic linebackers can flow and fill against the pull.
Key adjustment. Have the linebackers read the pull and flow; three athletic backers fill the wrap lane.
- Zone ReadToss-up
Athletic 3-3-5 linebackers can adjust to both the give and the keep.Show reasoning
Conflict defender. Backside defensive end (read key)
Why the offense wins. Light front gives the offense numbers advantages inside.
Why the defense wins. Athletic 3-3-5 linebackers can adjust to both the give and the keep.
Key adjustment. Have the stacked SAM scrape over the read end to the keep; the safety fills late.