This is good. Nebraska (in the 1990's) led the nation in rushing almost every year. Tenopir was Tom Osborne's O-Line Coach:
MILT TENOPIR – NEBRASKA ZONE BLOCKING
I. INSIDE ZONE BLOCKING (SPLITS 2 FEET OR LESS) :
The concept operates on the principle of our linemen being covered by a defensive lineman or being uncovered.
We are primarily concerned with getting horizontal or vertical movement on the defensive down lineman. The neat thing about this scheme is that our linemen merely need to know if they are covered or uncovered at the snap. We do give them a rule of: “on, playside seam, linebacker”, but a rule isn’t really necessary.
If our linemen have a defensive lineman on them we execute what we call a “stretch base block”. The first two steps by our covered lineman are critical.
If the defender is head up or on the playside shoulder, the first step is a lateral step to the call. We are trying to invite movement with the first step. Some coaches refer to this as a “bucket” step. We don’t want to lose ground on it, so we merely refer to it as a “stretch step”.
The second step is directed toward the middle of the defender’s body cylinder. Caution must be taken so this step doesn’t cross over our first step.
If you cross over, you lose all your driving power. Once the first two steps are taken, you are ready to strike with fists and drive the defender in the direction of his movement. Take him where he wants to go.
The uncovered lineman will also execute a “stretch step”, however, rather than going laterally, we step at the down defender that is covering our playside teammate. By stepping at the defender, we can stop a slant by the defender, enabling our covered teammate to re-direct and help get push on the defender.
The second step by the uncovered offensive lineman is directed at an imaginary point that is directly behind the near foot of the defensive lineman prior to the snap. If the uncovered lineman executes the first two steps properly, his head should be on the up-field side of the defender. If the defender plays straight ahead, a double team should occur between the two offensive linemen.
The linebacker is technically the responsibility of the uncovered lineman, but he must stay with the double team as long as possible until he has to get off on the linebacker. This means until you get to the linebacker or the linebacker comes to you.
The inside-out double team will create creases for the back to run through.
It’s important to stress that both linemen stay on the down defender as long as possible. Because of the rolling action of the running back, the linebackers normally flow to the call, then the uncovered lineman can bounce off late and get the linebacker on the rebound, allowing a cutback by the ball carrier.
The covered and uncovered theory holds true for everyone on the line of scrimmage except for the backside tackle. The backside tackle will execute a stretch double with the backside guard if the guard is covered.
If side by side linemen on the playside are both covered, then the one to the side of the play is on his own, executing a “stretch base block”.
If the playside guard, tackle, or tight end has a down defender lined up on the inside shade, get after him immediately, stepping with the inside foot. We assume he is already in a slant positon so there is no need to stretch him.
RB: Align at a depth of 7 yards. Roll to the inside leg of the playside tackle. Receive the handoff about 4 yards deep. Do not make a decision on whether to stay onside or execute a cutback until you replace the feet of our linemen. Press the point of attack.
II. OUTSIDE ZONE BLOCKING (SPLITS NO MORE THAN 1 FOOT):
Our man objective on the outside zone play is to initially try to get the ball outside. With that in mind, we are trying to force a hook block on all down defenders.
All of our linemen that are covered with a down defender executes what we refer to as a “rip-reach block”.
To execute such a block, we have the covered linemen take a hard lateral stretch step to the call side. We want to out-flank the down defender on that first step.
On the second step, we allow our covered linemen to use a crossover step to the callside.
The next thing we have him do is rip his inside arm through the callside armpit of the defender, similar to the rip that a defensive lineman will sometimes use on a pass rush.
We want our covered lineman to lean on the defender after he rips through the armpit and force his stomach upfield. If he does not do this, then his stomach will be facing the sideline and he loses sight of the linebacker. He will now try to escape for the linebacker.
If the playside guard and tackle are both covered, the tackle would have his defender by himself. He would go through the stretch, crossover step and rip technique, and then lean on his man, not thinking about escaping for the linebacker.
The backside tackle, upon getting to the line of scrimmage, checks if the backside guard is covered. If he is, the tackle will work with the guard even if he is also covered.
The uncovered linemen use a technique that we refer to as “pull and ovetake”. Before we can overtake the down defender to the call, we first must get our helmet past him, then get on him and roll him upfield.
The pull must be a lateral pull. We want to gain depth and distance on our first step on the pull. The one foot split is essential if you are going to get the overtake.
There will be occasions when the covered linemen can’t get un-hooked from the covering defender. If this does happen, the pull and overtaking offensive lineman should keep pulling and at times will have to come all the way around for the linebacker.
As mentioned earlier, the backside tackle works with the guard if the guard is covered. This means he would pull and overtake the man on the guard.
Some teams use in-line stunts to try to disrupt our zone schemes. The secret offensively is technique. If two adjacent offensive linemen are covered and the proper stretch is taken on the first step, it will become natural to pick up slants and loop-arounds.
RB: Take a path approximately 2 yards outside the original alignment of our tight end. The RB must get to the point of attack before he makes a decision to stay outside the tight end or skip-cut under his block.
If you go to gilmangear.com there are two videos from Alex Gibbs on the IZ and OZ. Stan Zweiffel has a book on the zone offense. Milt Tenopir who was already mentioned has a book called The Assembly Line. This is what I have and we run the Zone Offense. Zweiffel and Gibbs teach it differently however. You just have to take a look at it and see which way you like best.
On INSIDE ZONE everybody has an AIMING POINT (I.E. "LANDMARKS") on the defender. You step TO that aiming point no matter WHERE he lines up. That may change your angle of departure slightly, but NOT the block:
We express it like THIS:
1. UNCOVERED: 1st STEP AT DLM (45 DEGREE ANGLE) – SQUARE SHOULDERS ON 2nd STEP.
2. COVERED: HAT AT OUTSIDE # OF DLM.
Whatever happens from there depends on the DLM's technique (3 possibilities)! EXAMPLE:
UNCOVERED MAN: Take a lead step and catch up with your covered teammate as you READ the near knee of the down lineman on him. As you work through your playside gap – if the near knee comes towards you block his inside number & fit him up sliding in the direction he is going (eyeball Lber in case he comes inside); if near knee doesn’t come towards you work up on Lber. 3 situations can occur (see COVERED MAN).
COVERED MAN: Take a lead step with your outside foot eyeballing outside number of down lineman on you – second step with inside foot thru crotch of opponent. You must think man block and only go to Lber when wiped off by uncovered teammate. 3 situations usually occur: 1) Down lineman is in an outside shade & stretches – you stay on him and uncovered teammate works up on Lber. 2) Down lineman is head up & anchors on you – use double team technique driving him into Lber & stay on him until wiped off by uncovered teammate then work straight up on Lber. 3) Down lineman head up or inside shade & slants inside – force him to flatten his slant & stay on him until wiped off by uncovered teammate then work straight up on Lber
That is really ALL we teach on the IZ! Search (thru GOOGLE, etc.) for COACHILLUSTRATED.com (Joe Paterno's site). I wrote an article for him on there called ZONE BLOCKING PROGRESSIONS. Click on that for the diagrams, etc.
Should you wish to discuss this via phone - I can be reached at 804-740-4479 up until 10 PM/EDT!
Post by Coach Campbell on Sept 19, 2018 13:51:17 GMT
Just like in many sports I believe the answer to this falls solely on the players you have and the matchups you see on film. For example in baseball I may have a team one season who are juggernauts and can hit for power in all directions of the field. So my play calling as a third base coach will be hit the ball far oriented. However, the next season I may have players who smaller but fast as heck, so small ball (bunting/stealing) may be the answer to success.
We know that the main difference between man and zone blocking are that in man the player is in charge of the person in front of them. Giving the running back a particular gap to run through. In zone the linemen are in charge of an area. It is hard for me to pick one that is better than the other. However, often times in the high school level you will see more zone blocking because it makes the players rely on each other at times. For example: If you are running a stretch play to the right against a team with strong d linemen having the right tackle and tight end working together to double team a zone on their better player can lead to a big play or more yards. Running man in that situation to the same gap may get stuffed based on the lack of power/skill your linemen may have matching up against their d line.
As far as the extension of arms I think that allowing it for the offense and defense just levels the playing field. As a coach you must teach proper technique to your players. Once you feel comfortable with their ability to use their arms properly you can make a judgment on how you plan to use them.
So with really no perfect answer here I think it comes down to the matchups you see as a coaching staff on film and where you think your players fall into that scheme. If you have monsters who can handle the young men in front of them go with man and power through the gaps.