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Discipline in the run game; Why it Matters

 
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khodder


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PostPosted: Fri Jun 07, 2013 11:59 pm    Post subject: Discipline in the run game; Why it Matters Reply with quote

Gap Discipline or Gap Integrity, it is something you hear a lot of from me in game day threads if I am around or when just talking about our defense and their ability to defend the run; While watching some All-22 film of our defense vs the Jets I found a prime example of why discipline and gap integrity are so important on defense. Four screenshots follow and paint a not so pretty picture on this play.






From the top, this play, according the the alignments of the players seems to be a split gap play. those on the left hand side of the picture are aligned in a one gap set and those on the right hand side of the picture appear to be in a two gap alignment.

The black lines indicate the gap assignments of those lined up at or near the LOS and the one LB who I assume is responsible for the unassigned gap.

Moving onto to the second picture and you can see the play begin to unravel for the defense. On the left hand side of the picture you can see the defender in the yellow square playing his assignment perfectly, you can see the defender in the green square playing his assignment perfectly. You can see the "hole" open up in the middle, this is the gap the LB is responsible for coming downhill. On the right hand side of the screen, both the defender in the blue square and the outside linebacker on his side have lost their gap discipline already, The player in the blue square is doing exactly what the offense wants him to do, fall for then misdirection step of the running back and crash down and inside, note the position of #77 for the Jets closing off the outside angle to create a big outside hole for his running back.

The arrows represent the movement of the defenders. Both the blue square defender and the outside linebacker on his side of the action have turned what look to be two gap alignments into one gap play and have taken multiple false steps to the benefit of the offense.

In the third cap you can essentially see that the blue and green square defenders are occupying the same space and the same gap. The green square player has performed his assignment to perfection, the blue square player has done the opposite of this; he has taken multiple false steps and has taken himself badly out of position and to make matters worse has then allowed himself to be walled off. The outside linebacker on that side of the play has done the same thing, taking two defenders from the same side of the ball into the wrong place. You can see the arrows of their movement and the huge hole created for the running back.

The final shot shows in the red square three defenders occupy the same space, one is in the right spot, two are in the wrong spot and the running back running towards daylight.

Gap discipline gentlemen, it matters.
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mtdowner


Joined: 30 Jan 2013
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PostPosted: Sat Jun 08, 2013 9:34 pm    Post subject: Reply with quote

Last year's defensive line under Horton had very specific gap assignments. I believe Bowles new D allows for a much more undisciplined d-line asking the d-linemen to go make plays.

Do you see our overall rush D hurting because of this while perhaps seeing an increase in sacks and tackles behind the line of scrimmage?
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khodder


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PostPosted: Sat Jun 08, 2013 10:30 pm    Post subject: Reply with quote

mtdowner wrote:
Last year's defensive line under Horton had very specific gap assignments. I believe Bowles new D allows for a much more undisciplined d-line asking the d-linemen to go make plays.

Do you see our overall rush D hurting because of this while perhaps seeing an increase in sacks and tackles behind the line of scrimmage?


It's not less disciplined gap assignments, just more one gap assignments, discipline will still matter. Gap integrity is the single most important thing with run defense. Less to do with scheme, all to do with the discipline of the players.
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mtdowner


Joined: 30 Jan 2013
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PostPosted: Sat Jun 08, 2013 11:00 pm    Post subject: Reply with quote

khodder wrote:
mtdowner wrote:
Last year's defensive line under Horton had very specific gap assignments. I believe Bowles new D allows for a much more undisciplined d-line asking the d-linemen to go make plays.

Do you see our overall rush D hurting because of this while perhaps seeing an increase in sacks and tackles behind the line of scrimmage?


It's not less disciplined gap assignments, just more one gap assignments, discipline will still matter. Gap integrity is the single most important thing with run defense. Less to do with scheme, all to do with the discipline of the players.


So more one gap assignments would allow for more big plays for the opposing offense but potentially more big plays for the defense, correct?
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khodder


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PostPosted: Sun Jun 09, 2013 6:48 pm    Post subject: Reply with quote

mtdowner wrote:
So more one gap assignments would allow for more big plays for the opposing offense but potentially more big plays for the defense, correct?


Obviously one gap assignments allow more freedom to those on the defensive line to get upfield and make plays, but if you are too aggressive you end up creating issues.

It should lead to more negative plays and more plays in the backfield, but will likely also lead to more 8-12 yard runs and less 2-3 yard runs. Once you get past the initial line in a one gap scheme you usually come up against defensive backs so big plays tend to be more prevalent, especially if your LB's are playing downhill and plugging their gaps. You tend to end up with two levels a front seven and defensive backs. Gaps at the first level can be harder to find (Discipline and gap intergity are key here), but once past that level you can find yourself in a lot of open space, whereas in a two gap scheme you tend to play on three levels. Gaps at the first level tend to be there, but the LB's are there to clean up.

One gap schemes are more prone to allowing big plays and ususally create more big plays, two gap schemes are generally more secure and consistent in their outcomes.

In a two gap scheme you see lots of 3-4-5 yard runs, in a one gap scheme you are more likely to see -1-0-1 yards runs of 8-9-10 yard runs.

This is all theoretical too, and we still do not know entirely what Bowles plans to do on the defensive front except that he plans to utilise some more penetration from the defensive line.

It is all about balance and creating situations that you want your defense to be in to take advantages of its strengths.
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