Michigan Football: Mailbag question — 4-3 Over and 4-3 Under Defense
Really enjoyed your breakdown of the 4-3 over defense. Will you guys be doing a 4-3 under article as well? What are the differences between the 4-3 over and the 4-3 under defense? Are the under and over versions similar and how are the defensive linemen affected? Also, does Michigan have the personnel, and the depth to play this defense next year? Which defense would be better this year to play and also can they play both over and under with the available personnel?
Thank you for answering my questions.
Thanks James and for those that are interested in what James was talking about with the breakdown of the 4-3 over defense. GBMWolverine did a breakdown last weekend of the Coach’s Corner: 4-3 Over Defense with Personnel which was exclusively for our GBMWolverine board members.
You still need to be a GBMWolverine member to read it.
Now to the mailbag question.
James, the 4-3 under and 4-3 over are basically sister defenses.
They are both adaptations of the basic 4-3 front.
We hope the technical information and gap responsibilities below do not confuse you. But if so remember football is a very technical venture. Here is a photo of the technique with a numerical identification system is used to describe where defensive linemen and possibly linebackers will line up against an offensive front (offensive linemen and tight ends).
In the 4-3 under the alignment basically calls for stemming or shifting the defensive front towards the tight end.
The nose tackle plays an outside shade on the offensive center to the tight end side. The strong side defensive end plays a 5 technique outside shade to head up on the offensive tackle; The Sam linebacker plays an 8 or 9 technique, head up to an outside shade on the tight end. The quick side defensive tackle plays a 3 technique, outside shade on the offensive guard away from the tight end and the quick side defensive end plays an outside shade on offensive tackle.
In the 4-3 over defense, the defensive front stems, or kicks away, from the tight end.
The strong-side defensive end plays an 8 technique head up on the tight end; the strong-side defensive tackle plays a 3 technique outside shade on the offensive guard to the tight end side. The nose tackle plays either a 1 technique to an outside shade on the offensive center, or a 2 technique inside shade on the offensive guard. Finally, the quick side defensive end still plays an outside shade on the offensive tackle.
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Written by GBMWolverine Staff
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