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Main / Discussions / Defensive Line in 3-4 vs 4-3 Search Forum
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Spoonerific
posted: 2013-04-30 15:50:17 (ID: 94202) Report Abuse
alexshans84 wrote:
Spoonerific wrote:
Nogard wrote:
LBs only pass rush on blitz. but not only OLBs. MLBs too. but be careful cause there are holes on run defense when they blitz.


There are designed run blitzes as well...


Not here, blitzers can't tackle a ball carrier afaik


Yeah, I figured from reading through the thread... it just doesn't make sense to the Defensive Coordinator in my head is all. And how Base 34 seems at worse as good against the run as Base 43... although it may be from people running more to the outsides, but there isn't a way I know of to see defense vs. outside run.

Back to blitzing... looks like doing it on goal to go should be discarded.
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Leijona
posted: 2013-04-30 17:47:10 (ID: 94230) Report Abuse
I don't get the argument that 3-4 should be worse against the run than 4-3.

Out of NFLs top 10 best defenses versus opposing teams rushing yards per attempt (least being best) four are considered to be based on 3-4 principles. (Houston, SF, Pittsburgh, San Diego.) 3 out of them are top 5.

This is pretty impressive considering only around 10 teams in the league had 3-4 base defense in 2012.

I'm pretty sure that NFL teams have long since proven that 3-4 is a very viable run defense. If you familiarize yourself with the YPA stats of the last 10-ish years, you might even argue that 3-4 teams have done better against the run than 4-3 teams.
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BuzzKill10
posted: 2013-04-30 17:53:47 (ID: 94232) Report Abuse
the only real difference between 3-4 and 4-3 on run defence (in real life) is who takes what gap. More guys standing up doesn't mean that the run defence is suddenly much worse. Therefore the fact that 43 and 34 are about the same on run defence is realistic!

stopping the run should and is down to the players ability rather than the system!

Last edited on 2013-04-30 17:54:07 by BuzzKill10

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hosh13
posted: 2013-04-30 22:26:49 (ID: 94262) Report Abuse
Yes, it's a simple matter of comparing DT2 with ILB2.

The 4-3 should typically get more pressure on passing attacks but at the expense of diluted coverage.

On the other hand, it might be better vs the run if the DL, and particularly the DTs, are good run stoppers. Same thing for the 3-4 i.e. it depends a lot on what sort of players you have and how they're utilized.
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panoramix
posted: 2013-05-01 00:06:16 (ID: 94264) Report Abuse
BuzzKill10 wrote:stopping the run should and is down to the players ability rather than the system!


Ok about the player's ability, but IMO is down to the depht of the alignement of LBs and secondaires and to the blitzing management: the defense in AF is not the choice of a numeric formation.

Last edited on 2013-05-01 13:42:59 by panoramix

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Spoonerific
posted: 2013-05-01 03:03:56 (ID: 94268) Report Abuse
But this isn't an over 34 that typically good runstopping teams use... which is derived from the run blitz theory of overloading a preferred side, gap or forcing zone schemes to extend until help arrives.

From what I understand... OLB and MLB blitz the same amount. It looks like the 4 LBs are all lined up off the line of scrimmage... but maybe that visual is inaccurate like the flexbone, I don't know.

As someone with a relatively good amount of experience playing and coaching defense... 3-4 with no one up is a pass defense.
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dark_wing
posted: 2013-05-04 06:12:36 (ID: 94550) Report Abuse
BuzzKill10 wrote:
the only real difference between 3-4 and 4-3 on run defence (in real life) is who takes what gap. More guys standing up doesn't mean that the run defence is suddenly much worse. Therefore the fact that 43 and 34 are about the same on run defence is realistic!


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Lohengrin
posted: 2013-05-04 15:46:10 (ID: 94638) Report Abuse
The defense alignments are very similar, really - I think if you compare them over the past few years, the 3-4 and 4-3 will be statistically equivalent in defending the pass and the run. The primary difference I believe, and this was the crux of my original question, is the type of personnel to fill the schemes. DEs in a 4-3 are like OLBs in a 3-4: speedy, agile, and quick. DEs in a 3-4 are like DTs: gap-fillers and run stoppers. The player "builds" for a 3-4 vs a 4-3 are very different
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dgrid
posted: 2013-05-05 02:33:46 (ID: 94710) Report Abuse
Lohengrin wrote:
The defense alignments are very similar, really - I think if you compare them over the past few years, the 3-4 and 4-3 will be statistically equivalent in defending the pass and the run. The primary difference I believe, and this was the crux of my original question, is the type of personnel to fill the schemes. DEs in a 4-3 are like OLBs in a 3-4: speedy, agile, and quick. DEs in a 3-4 are like DTs: gap-fillers and run stoppers. The player "builds" for a 3-4 vs a 4-3 are very different


34 def is almost like a 5-2, with very versatile DEs.
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hosh13
posted: 2013-05-05 10:27:38 (ID: 94742) Report Abuse
dgrid wrote:
34 def is almost like a 5-2, with very versatile DEs.


....apart from that tiny little detail of there being no OLBs in the 5-2 and the consequent huge vulnerability to passing and outside runs.
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