LISTEN: Final 49ers 7-Round Mock Draft With Steph Sanchez →

There are 245 users in the forums

switch to a 4-3

Shop Find 49ers gear online
Originally posted by Giedi:
Originally posted by jonnydel:
The 4-3 and 3-4 actually require much different player types. While it's been true that many pass rushing DE's can transition to an OLB in a 3-4 scheme it's usually only as the weakside OLB because the weakside OLB in a 4 LB formation usually does not have pass coverage responsibilities. With a 4-3 scheme your DT's play very different technique as well and as a result require different player types to effectively play those defenses. In a 3-4 your DT's play a 0 and 4/5 techniques with 2 gap responsibility. Meaning, they are responsible for the gaps on either side of them. This allows the 2 ILB's to be freer to roam on their sideline. With a 3-4 your outside DT's need to have excellent lateral movement while engaged and your NT has to have very strong hips and be able to swing their hips around very quickly. Think of how many times you see McDonald or Dorsey near the ball on runs away from them or how often you see them moving sideways.

In a 4-3 your DT's need more vertical movement ability to be able to disrupt their running lane. Think of Seattle's DT's how they're always pushing upfield, rarely moving sideways. In this, your DT's don't' need to have the lateral movement and need more of the quick first step.

Switching your DT's from a 3-4 to 4-3 or vice versa is not a simple thing. Think of the two stud NT's we've had the past few years that moved to 4-3 schemes, Franklin and Sopoaga and a pretty good RJF. How did any of those guys do in a 4-3 scheme? Not well....

Furthermore, trying to switch either Brooks or Aldon to an OLB is not the best situation for us. Brooks' strength is in his ability to set a hard edge on the corner and his bull rush. He does not have great lateral movement which makes him a liability in coverage. A strong side OLB often has a deeper coverage responsibility in zone or has man coverage on the TE and putting him in that situation is not ideal.

Also, with a 4-3 scheme you usually want a little smaller MLB who is able to move sideline to sideline like a Luke Keuchly type. I think either of our guys Willis or Bowman would excel in this position, you're then moving 1 of them away from the middle of the field which makes it easier for teams to take 1 of them out of the play.

Personally, I think our personnel is much better suited to the 3-4 than a 4-3. When we go nickel or dime, we're not in a 4-3 we're really in a 2-4-5 or a 2-3-6 defense.
Well, Fangio sets up the defense in a 3-4 where Aldon is in a two point stance. Then he blitzes Aldon. That's a 4 man rush. Same thing on the other side. Ahmad brooks is in a two point stance and he blitzes Ahmad (has him rush the passer) and Aldon drops back in coverage - again that's a 4 man rush. That's essentially a 4-3 with either Aldon or Brooks alternating as OLB's and Willis and Boman as the alternating middle linebackers. Personally I like the scheme. I don't want him to change that aspect of the defense. Teams have a difficult time accounting for either Brooks or Aldon and all it takes is one mistake in protection calls and whalla - sack or turnover - from basically a disguised 4-3.

The three down linemen are generally Raymac, Glenn Dorsy, and Justin Smith - in three point stances and they aren't small guys. Dorsy is just south of 300, Raymac is 290, and Justin is a disruptive 290. They aren't a typical read and react 3-4 defense, they are a gap penetrating 3-4 defensive scheme. Meaning, based on who is called to rush the passer (Aldon or Brooks) they slant into the o Line gaps differently and unpredictiably. I dont think the down linemen in Fangio's scheme are there to hold ground like a typical 3-4, instead they are there to get into the backfield on run plays and screw up the blocking assignments, and on passing plays - rush the passer. It's the nickel defense that is set more in a traditional 4-3, where we have DE's Justin and Raymac as the DT's and LB's Aldon and Brooks as DE's -- like you stated it's a 2-4-5 in personnel but really a 4-3 in scheme.

Point being - this defense can play multiple schemes because of the players we have and the type of a pressure defense we play. My only peeve has been in the passing game in the playoffs where our defensive backfield hasn't held up. I think our failures in the post-season have more in relation to philosophy and scheme than bad drafting and bad defensive back development. Yes we can and we will, in this draft, get some DB's -- I think you can count on that almost 100% but I think with a George Seifert kind of philosophical change - you will be looking for big corners that can run support, whereas if you go with a dome patrol kind of philosophy, I think we'll be drafting more coverage DB's that don't run support well.

I do have to respectfully disagree on these points. What makes a 3-4 a 3-4 instead of a 4-3 under defense is not that you have an OLB rushing, it's that the two are interchangeable and it's not always going to be the weakside DE. What you're thinking about is a 4-3 under scheme where the weakside DE is in a two point stance and the SOLB moves head up over the TE. In this defense the weak side DE rushes the passer and never drops into coverage. It gives a 4-3 defense the edge stopping advantage of a 3-4 but only ever puts their best pass rusher in rushing situation. We definitely have more of a hybrid 3-4, but it's definitely a 3-4 as Smith and Brooks rarely switch sides. There's not strong side LB. Also, if the TE shifts or motions you don't see WIllis and Bowman trade places because there's no designated strong side or weak side ILB as there would be in a 4-3 under scheme. Also, the film does not support a gap shooting D-line. On film you see all 3 DT's primarily trying to eat up blockers to keep the LB's clean with a lot of lateral movement. The technique Dorsey uses is always a 2 gap technique and he did very well at it all last year, they even talked about the D-line's great 3 gap technique on nfl playbook.

as fr our nickel being a 4-3 scheme, I sort of agree with you. Only in that the majority of the time we use Aldon and Brooks as pass rusher. However, we do have multiple plays during a game where one of the two will drop into coverage when we blitz Bowman or Willis. Also, Smith and Brooks are never true DE's in a Nickel package, they really are OLB's. It's kind of splitting hairs, but that's what I do.... it drives some of my friends nuts.....
LMAO
no
/thread
  • Giedi
  • Veteran
  • Posts: 32,246
Originally posted by jonnydel:
I do have to respectfully disagree on these points. What makes a 3-4 a 3-4 instead of a 4-3 under defense is not that you have an OLB rushing, it's that the two are interchangeable and it's not always going to be the weakside DE. What you're thinking about is a 4-3 under scheme where the weakside DE is in a two point stance and the SOLB moves head up over the TE. In this defense the weak side DE rushes the passer and never drops into coverage. It gives a 4-3 defense the edge stopping advantage of a 3-4 but only ever puts their best pass rusher in rushing situation. We definitely have more of a hybrid 3-4, but it's definitely a 3-4 as Smith and Brooks rarely switch sides. There's not strong side LB. Also, if the TE shifts or motions you don't see WIllis and Bowman trade places because there's no designated strong side or weak side ILB as there would be in a 4-3 under scheme. Also, the film does not support a gap shooting D-line. On film you see all 3 DT's primarily trying to eat up blockers to keep the LB's clean with a lot of lateral movement. The technique Dorsey uses is always a 2 gap technique and he did very well at it all last year, they even talked about the D-line's great 3 gap technique on nfl playbook.

as fr our nickel being a 4-3 scheme, I sort of agree with you. Only in that the majority of the time we use Aldon and Brooks as pass rusher. However, we do have multiple plays during a game where one of the two will drop into coverage when we blitz Bowman or Willis. Also, Smith and Brooks are never true DE's in a Nickel package, they really are OLB's. It's kind of splitting hairs, but that's what I do.... it drives some of my friends nuts.....

I think we are saying the same thing in different ways. First of all, yes, our base defense personnel is definitely a 3-4 defense. No doubt about it. The three down lineman's responsibilities are indeed to keep the LB's clear from being blocked so they can flow to the ball carrier. Also agree that RayMac and Justin don't switch sides as in a 4-3 under shift. Yes, we are basically from a personnel design point of view a 3-4 defense. But again, schematically speaking, you can line up in a 3-4 - and again scheme-wise (not talking about personnel) and that fourth rusher (Aldon or Brooks) rushing turns it into a 4-3 scheme. Keep in mind the 4-3 is basically four down linemen rushing and not dropping back, and then the three linebackers have coverage and pursuit responsibilities. The only real difference scheme-wise is that in our hybrid system Aldon **OR** Brooks is that fourth rusher and I think that when either one rushes - that matches up with a basic 4-3 scheme. If you look at the film, it's either Aldon *OR* Brooks rushing and I think it's a rare play where you see *both* Aldon and Brooks dropping into coverage.

I think one of the reasons Fangio does that is to screw up the protection calls on offense and disrupt it and get to the QB via pressure. I also think that's why Fangio has so much success getting underperforming 4-3 DT's like Dorsey to come here and shine. If there is any disagreement here (and I don't think there is) is exactly which hair to split and how fine to split it.

Re: gap penetration. I've seen plays where Justin or RayMac, knowing they have a backside rusher coming in (Brooks for RayMac, and Aldon for Justin)to help in edge contain, they take a hard charge into the Guard/Center gap on run plays to get into the backfield. I think that's by design, when Fangio can reasonably guess where the run play is going to go (either run left or run right). So, in this example, if the run is going towards RayMac's side, I've seen Justin just jump into the Guard Center Gap and basically gumm up the blocking for the RB and Aldon comes in from the backside and gets the RB.

Re: Nickel, yep you are spot on! and where I have a beef and a problem with Fangio is not our Base 3-4, but our Nickel Schemes. I'd like much stronger man press, run support Cornerbacks that can turn the play inside. I think Fangio does an incredible job getting Linebackers and developing a front 7. He's out of this world on that. But if there is a kryptonite weakness to Fangio it's his Cornerback development. He's always had good safeties, Bret Maxi and Gene Atkins comes to mind from the Old New Orlean's dome patrol days. But I've never heard of Fangio developing any all pro corners like George Siefert to my recollection. Maybe somebody can correct me on that.
NO.
The Skuta /Brooks tandem that subbed for Aldumb was beastly.
No.
no
LDE: Ray Mac
DT: Tank
DT: Cowboy
DE: Aldon
WLB Willis
MLB: Wilhoite/ Moody
SLB: Brooks
FS: Reid
SS: Bethea
CB: Brock
CB: Wright


Just for s**ts and Giggles I'd like to see this 4-3 defense for a few plays in pre-season ...our front 4 would get some nice push ...let Willis roam the field and make plays at WLB, unleash Brooks as a pass rusher from SLB ...Just think how fast the defense would be if Bowman was available ...I'm not saying try it in the regular season , but throw a 4-3 look out there for a couple passing downs ....but I agree our players are best suited for the 3-4
  • CMIO
  • Member
  • Posts: 1,483
Yeah, we lost. It hurts, but realistically (without our homer glasses), we expected this. A depleted defense against a HOFer.

To be honest, if Seattle hadn't lost their last 2, we'd be in a world of trouble. Assuming Arizona comes down to earth, the division (not a Wildcard) is still up for grabs. No way the West sends two teams this year, especially since GB, Dallas, Philly, and Detroit are all playing well.

With that said, minimum win/loss record to have a shot at the playoffs is 11-5. 12-4 will likely win the division.

I don't expect us to beat Seattle in Seattle, so that leaves us ONLY losing to maybe SD or New Orleans and winning the rest of our games. It's gonna be a tough order, and that Chicago loss may come back to haunt us when it's all said and done. Im praying that our defense coming together in the 2nd half of the season brings home a BIG RUN. But to be perfectly honest, with so many division games left, Im not so optimistic at this point.


What makes this worse is that we have to go 2 weeks with this bad taste in our mouths.

We will finish 13-3. Mark my words
  • CMIO
  • Member
  • Posts: 1,483
Originally posted by ninerfan4life:
We will finish 13-3. Mark my words

TBPH, the only teams left on our schedule that "scare" me are Seattle (in SEA) and NO (dome game). I think we can beat all the others with no prob.
Originally posted by ninerfan4life:
We will finish 13-3. Mark my words

I like the optimism. The bottom line is we had no chance to win tonight from the get go. They are completely healthy and firing on all cylinders. We are missing 6 starters on defense, 3 of them being all pro players. Lets get healthy and finish this season up strong. There is not one team in this league that can beat us completely healthy.
I fully expected for our Defense to get torched. What shocked me was how incredibly ineffective our offense was. We really needed them to step it up tonight, but the exact opposite happened. They are too dumb talented for this type of discord to be hindering us every week. I'd hate to say it, but it ABSOLUTELY has everything to do with Roman having zero identity in his scheme. He needs a rebirth, or he needs to be fired. There is no f**king excuse for this offense struggling this bad.
  • Antix
  • Veteran
  • Posts: 9,840
Not mad at this loss. We did exactly what we couldn't. We came out and farted in our first two drives on offense. Can't do that against Manning. We knew our D was gonna struggle. We had to cone out firing on offense and for some reason we didn't. We lost this in the first 7 minutes.

We got an ok chance for the playoffs but we're not winning anybody's super bowl until the offense realizes its potential. So many plays out there to be made and we s**tted them all away. We have too many playmakers to be struggling the way we do. Its coaches and players. They gotta figure it out together.
Share 49ersWebzone