Grantland just published an awesome article about Pete Carroll and how he's used and adapted the 4-3 Under defense over the years. And, more specifically, how the hybrid versions of the scheme he's using with the Seahawks today have helped them adapt to the modern offenses and be as dominant as they have.
Note: It's a somewhat lengthy article, so save it for when you have a bit of time.
EDIT: Chris Brown of Smart Football wrote the article.
Over at Grantland Chris Brown of Smart Football has a great article on Vince Wilfork and the Patriots D.
The main focus on the article is how Belicheck makes his Hybrid 3-4/4-3 work. The biggest part of this article for Michigan fans is the part where Chris Brown explains the history of the formations and how we arrive at Michigan's 4-3 Under front. Especially since so many people think we're recruiting for a 3-4 (Guess what, we're NOT! http://mgoblog.com/content/mailbag-3-4-switch-again-kenpom-basketball-leaders-more-you-know, http://mgoblog.com/category/tags/last-time-we-are-not-switching-3-4)
this is good stuff. He explains the main differences between the techniques required in the 3-4 vs the 4-3. I tackle the (lack of) personnel differences between a 4-3 Under and a 3-4 here:
But here are the juciest bits from Chris Brown (the whole article is definitely worth a read):
These 4-3 and 3-4 teams typically differ in a key respect: which "technique" their defensive linemen use. Usually, teams must commit to one technique or the other, as each choice has all sorts of other implications for the defense.
And the first question for a defensive lineman is always, Am I playing a 2-gap technique or a 1-gap technique?
"Gap" refers to the area between offensive linemen. A 1-gap technique is just what it sounds like: The defensive lineman lines up in front of the gap he is responsible for and his job is to attack and control it. If nothing else, a defender must not allow a runner to go through his gap. While defensive linemen attack their gaps, the linebackers behind them are responsible for their own gaps. These are the defense's "run fits," meaning how they fit into an offense's blocking scheme to take away running space.
Pretty much we're going to run the 1-Gap 4-3 Under because it's a lot simpler to teach. 2-gap systems like the 3-4 are a lot harder to run. Just go read the article, it's great.
[Ed-S: Festivus Bump!]
In modern football, there are 2 popular base defensive sets. Most teams run either a 3-4 Base or a 4-3 Base.
The quick explanation of these defenses is that the first number (“3” in a 3-4) is your number of Down Linemen (literally people who line up with their hand on the ground in a 3 or 4 point stance on the line of scrimmage) and the second number (“4” in a 3-4) is your number of linebackers (people who line up in a 2 point stance, behind the down linemen).
This diary will discuss the 4-3 Under, its similarities to a 3-4 set, and make sense of our defensive line recruiting. For the purposes of this diary I’m ignoring the secondary. You need corners and safeties. They’re all similarly sized players, get fast ones. The front 7 is where you need guys over a 100lb range and some more major differences show up.
Here’s a base 4-3:
Here's a base 3-4:
Both of these defensive base sets have advantages and disadvantages, and both lend themselves to different styles of players. When it comes to what Michigan is running as a base defense, the 4-3 Under, recruiting starts to make sense if you look at it as a 3-4 defense.
The 4-3 Under:
First, look at the D Line from the middle out. In a 4-3 Under you have a defensive tackle on the Nose, in a 0 or 1 Technique (NT) (Technique definitions:
You then have 2 players lining up at the 3 tech (DT) and 5 tech (SDE). Then you have 2 players further out on the line, at a 7 tech (WDE) and 9 Tech (SAM). Finally, you have 2 linebackers off the line of scrimmage (MIKE and WILL).
Now, compare these positions to the 3-4 Base. You still have a huge space-eating Nose Tackle (NT) who lines up at the 0 or 1 tech, 2 Defensive Ends over the guards, tackles, or in between (4 tech... hmmm, just a slight shift from the 3 or 5 tech...) and 2 people outside of them near the line of Scrimmage (OLBs). Finally you have 2 linebackers off the line of scrimmage (MIKE and WILL).
If you look at these two defenses, the only main difference is one of your 3-4 OLBs has his hand on the ground. That’s it! There are minor shifts on the line and other intricacies, but big picture the 4-3 under has personnel requirements very similar to a 3-4.
For the 4-3 Under OR the 3-4 in your front 7 personnel you need:
- 3-Tech DT and SDE (5-Tech)
- WDE and SAM
Michigan is recruiting the right numbers for the scheme they run. These are 17-year-old guys we’re discussing with recruits. Some will get bigger, some are maxed out. Some of the WDE/SAM types will be better at coverage and will play SAM. We saw Frank Clark and Beyer make this switch this year, one was a LB, one a DE in High School, and they switched at Michigan. Some will be better pass rushers and will drop into coverage less at the WDE.
The “Glut” at SDE doesn’t exist since the 3-Tech DT is a very similar position in the 4-3 Under, so some of these guys will play there. The coaches know what they need to run the 4-3 under, and hopefully this diary provided some insight into the personnel requirements so we can somewhat understand the method to the madness.
= -5. But seriously folks...
I have been reading that it looks like the 3-3-5 is in fact the primary defense being used right now in practice. The D-Line will be Martin, Campbell, RVB, but right now Greg Banks is in Martin's spot. The Spur and Bandit are the Strong (Box) Safeties that will line up outside the D-line and closer to the line of scrimmage than the Linebackers. The Spur and Bandit spots are occupied by Kovacs and Mike Williams. Your MLB is still Ezeh, LOLB is Mouton, and ROLB is Roh. Woolfolk and JT Floyd are your CB's and Vlad is your FS (Cam Gordon is in his place right now)
I also wanted to put this topic in because it looks like the 4-3 Under is also being implemented with the same line-up, only Roh is the 4th D-lineman with his hand down and Mike Williams is the new SAM.
I think most of us on this board that were going back and forth about 4-2-5 and 3-3-5 changes with Roh putting his hand down, but it looks like instead it will be GERG's Under package.
I'm reading this year's Hail to the Victors magazine that Brian edited (excellent, as always) and trying to understand the terminology of the hybrid positions, but there seems to be inconsistency from site to site. In the magazine, Brian says that the spinner is the hybrid LB/DE, and that the term "quick" refers to the same position.
I've seen other sites and posts here referring to the LB/S position that Stevie Brown will play as the spinner, and the LB/DE as a separate position, the "quick", or preferably, the deathbacker. Anyone know what the terms officially mean?
Warning! I am not a coach and I haven't played football since eighth grade. However, I have taken an interest in offensive and defensive schemes lately. Most of what I have learned has come from reading Smart Football, Three and Out, Trojan Football Analysis, and of course Brian; especially his piece in HTTV 2009.
I think one of the biggest reasons why the hybrid positions are getting so confused is the fact that coaches all have different names for the same hybrid position. To Pete Carroll the “Spinner” is called the “Elephant” and others call it the “Quick.” All this position really is, is the WDE. Now in the 4-3 under (at least the one we are using) he is moved way outside the tackle. The reason I believe we do this is so that we can use a smaller player and that is able to speed rush the passer, hold weak side contain, and fall back into coverage for a zone blitz. With the player being so far outside they don't need to be as refined in their technique and can use their athleticism in space. This is the position that is being battled for by Evans, Herron, and Watson.
Brandon Graham is going to be the SDE this year. This of course could limit his effectiveness as a pass rusher. However, he has the most refined technique of all the defensive ends and will probably draw many double teams. These double teams will most likely lead to one-on-one battles for at least two defensive linemen (which I am considering the “Deathbacker/Spinner/Quick/Elephant” to be).
The other hybrid position in our defensive is the one occupied by Steve Brown. But just like the “Spinner” is just a WDE but with a fancy name, Mr. Brown's position is just the SLB but not the John Thompson version. Obviously, spread offenses are everywhere and to combat this defensive coordinators made the SLB more like a safety. But they also want someone who can handle a tight end in man coverage and in run situations so this may be why the coordinators just didn't use a normal nickel package. In the 4-3 under the SLB is in an inside-foot to outside-foot alignment on the tight end also called a 9-tech. If there isn't a tight end then I believe he will play nickelback to the strong side – however GERG determines which side is the strong side.
coaches use different conventions for which side is the strong side.
Some call the strong side the side with the tight end. Others call
the strong side the side to the quarterback's front (non-blind) side. I am not
sure but I think that we will be using the first convention.
Note that Steve Brown and Brandon Graham are going to be on the same side. And both will be lined up on the line of scrimmage.
According to Pete Carrol the WLB is protected in this scheme, so they don't have to be “thick necked jokers” either, they need to run sideline to sideline and make plays. This is Jonas Mouton's position.
It looks to me like a guard might have a free release on Obi in this formation, but I would like to defer this question to someone who knows more about football than I.
Earlier someone posed the question as to why we don't use Brandon at the WDE position (they called it the 'Shembackler' which I like but for clarity's sake I'm sticking with WDE). This was actually why I started writing this in the first place. It seems to me that what is most important for the WDE position in this scheme is the ability to rush the passer and the ability to play in space. Brandon can most certainly rush the passer and given that he played linebacker in HS he could probably play in space – not to mention his freakish athleticism! So why don't we move him there? I think the answer is because we don't have a DE as polished as Brandon to play the SDE, especially since Ryan Van Bergen could be starting at the 3-tech DT! We have athletes, and this is the number one criteria to playing the WDE spot in our 4-3 under; as far as I can tell anyway. Hopefully they can at least speed rush the passer; playing well in space would also be helpful.
On to other musings! If our starting D-line is going to look like BG, Martin, Van Bergen, someone at WDE then I would think we should be pretty good at penetrating the O-line (clean thoughts people!). Does this mean we will be susceptible to counters and traps? Can someone weigh in on what the advantages of having a small line like ours might be? Plus, I think we can all envision what the disadvantages are so I was wondering what the bright side could be.
If you are craving more info I would recommend reading this Trojan Analysis link keeping in mind that Steve Brown is the SLB in the diagrams and BG is the DE on his side. Then delve as much as you wish! Chris Brown and gsimmons85 have so much football knowledge packed into their sites you can read on for days and – like Brian – forget what the sun looks like!
I'm not one to get defensive so feel free to tear this apart! In fact I welcome any criticism since I will most likely learn something or get a laugh.
One last thing. If you frequent mgoblog and you don't buy HTTV 2009 then you are a fool! In fact you will be known as a fool all your life and when you die all people will say about you is: 'The fool is dead.' So don't be a fool and buy HTTV 2009 today!