Three Coverages Every Quarters Team Needs in Its Toolbox

Go beyond static Quarters and be aggressive in your coverage schemes.

Split-field Quarters is one of the most adaptive and flexible defenses a modern defensive coordinator can base out of. It molds and flexes to fit whatever an offense can throw at it. Offenses can only throw so many different numbers on either side of the center; up to four eligible receivers at the most, and Quarters can adapt to all of them. At the fundamental level, Quarters is based off a numbers system. The corners always relate to #1, the safeties and outside linebackers #2 (bracket), and the Mike always relates to #3. If a player can count to three he can play Quarters.

Utilizing split-field coverages takes the Quarters scheme one step further, creating even more adaptiveness and flexibility. Being able to tag a base defense with small coverage manipulations can transform a static Quarters look into a robber, invert (Sky), or trap coverage. Pressure doesn’t always have to be the answer either. The defensive coordinator doesn’t have to outsmart his coaching counterpart on the other side of the ball, just the young QB trying to run the offense.

Many coordinators want to focus on pressures as a way to combat offensive schemes. Don Brown, the Defensive Coordinator for the University of Michigan puts the words “Solve your problems with aggression,” in his install playbooks. Pressures are a great way to force the issue with offenses, but sometimes a defense needs to sit back and run its base. When sending five or more, a defense loses a man in coverage and can get overexposed or become deficient in a certain zone if the blitz coverage is not structured correctly. On early downs, many top DCs like to sit in their base defense. Being static can have its own set of issues too, but adding coverage tags to change leverage points and run fits can be just as “aggressive” as a pressure and force the QB to beat the defense and not the OC.

Aggression can mean a multitude of different things when it comes to defense. The obvious answer is to blitz, but defenses can manipulate the secondary to be aggressive in their pass distributions and against certain receiving threats. Every offense has counters built into their scheme to take advantage of a defense vacating zones or spinning to single-high. Not every problem can be fixed through blitzing. Sometimes you have to play your base. Below are three ways a split-field Quarters team can tweak their coverage while staying sound and aggressive in nature. You know, Cautious AggressionContinue reading “Three Coverages Every Quarters Team Needs in Its Toolbox”

Steal Coverage to Combat Air Raid Offenses

A “how to” guide to defending the Air Raid’s top pass concepts.


With the birth of the Air Raid offense under Hal Mumme and its expansion under Leach, the Air Raid concept has flourished alongside the advancement of the spread in modern football. The Air Raid offense, in particular, is married well with the no-huddle concept and can be run out of multiple formations even with the added effect of tempo. True Air Raid offenses base out of 20, 10, and 11 personnel sets. Many of the concepts needed to run the offense utilize 2×2 and 2×1 sets to put pressure on the defense’s back seven.

The Air Raid offense and its vast offshoots still boil down to several basic concepts. The key to any Air Raid offense is the use of “triangle” and simple high-low reads. The offense has been used to rewrite many record books and its concepts are present in most modern spread offenses. The main way Air Raid teams attack a defense is the soft middle of the field left by vertical pushing routes with the outside wide receivers. This vertical push forces the safeties in a two-high look to climb with the outside WRs. The zone dropping linebackers are left to defend WRs coming from the opposite way behind their view. These simple crossing routes are deadly to a defense that cannot get support from the backside safety or simply spot drop. One way a defense can counteract the Air Raids propensity to attack the soft middle vacated by the boundary safety is to run “Steal” coverage.

Steal Coverage

Unlike “Read” Coverage that takes advantage of the offense attacking the front side triangle (think pick/flat/corner), “Steal” coverage uses the boundary safety as a “robber” for the crossing routes. Much like its sister versus Trips coverage “Solo,” Steal uses the boundary safety as a spy on a front side WR. The main objective of the DS in Steal is to read the crossing route and hold his ground in the window vacated by the Will LB. The diagram below demonstrates Steal Coverage:  Continue reading “Steal Coverage to Combat Air Raid Offenses”

Defending 20 Pers. With Read Coverage

Use a field “robber” scheme to defend 20 pers. pass schemes.

Defending the run versus 20 personnel is hard enough. Factor in offenses using this set to RPO the defense, it can be difficult for a defensive coordinator to decide how to attack it. Using multiple coverages, fronts, and stunts/pressures can keep an offense on its heels, but there has to be a plan. If a DC moves the Sam closer to the box and plays quarters behind, the offense can take advantage of the lack of cover down and throw out routes or stops all day. These routes play off of the leverage of the safety, which in quarters happens to be deep and inside. Spinning to the two receiver side leaves the offense vulnerable to the backside RPO or weakside run (lack of plus-one). A weak spin is sound and keeps the defense even, but still gives up the flat and backside choice route. 20 personnel is one of the hardest formations to defend because the offense has added an extra player to the box and can create a new gap on either side of the formation.

Staying Two-High

Playing Four-Press (Sky) to 20 pers. can be a great deterrent to offenses that utilize RPOs in their scheme. The pressing corners eliminate much of the route tree and force low percentage throws outside (ex. – Fades). The Down Safety to the boundary acts as a catch-all and plus-one versus the weakside run. In Sky, the boundary safety can “rob” the underneath of #1’s route and will drive on any slant. To the field, the Sam can cover down to the slot, essentially deterring bubble routes while the Cover (field) Safety fits off the Sam. The issue in Quarters versus 20 pers. is the outside flat to the field. If the Sam is aggressive to a run look (like he is in the Narduzzi/Dantonio scheme), the offense can take advantage of the Sky safety basically being in man coverage on the slot and the corner being run off by #1. Even versus an out route the Sam, who aligns inside (apex in Narduzzi’s Pitt defense – quick box force), can be frozen by a run read and late on the pass. See below:


In many 4-3 (apex cover down) schemes, the Sam linebacker is taught to gain a run read while relating off the slot WR. The problem with this technique is the Sam is late on out routes. If the Sam is over aggressive, the offense can take advantage of his vacated area. Late in the second quarter of the 2016 Pinstripe Bowl, Northwestern started to take advantage of Pitt’s aggressive Sam versus 20 and 11 pers and Narduzzi’s Press Quarters scheme. Northwestern turned to a Smash concept (stop/corner) to take advantage of an aggressive Sam and the inside leverage of the safety, but Narduzzi had checked to his Read Coverage or a field robber that disguises as Press Quarters. The Field Safety shifted to the outside of the slot as the QB gave his indicator. The outside leverage helped the safety defend the Corner route by the slot. The QB had to place the ball high and away leading to an incomplete pass.

On third down, Northwestern ran a Divide scheme (three verticals dividing the field into thirds) and took advantage of a blown coverage by the safety (Trap 2 Zone Blitz – roll strong & the safety didn’t “top” the fade), getting the Wildcats inside the Pitt 30 yard line.

Assuming Pitt would stay in their traditional quarters look, Northwestern turned to a zone RPO out of Trey to attack the crashing Sam and isolated safety. The QB read the Sam working into the box and flipped the ball out to the slot on a stop route. The safety missed the one-on-one tackle and the WR worked deeper into the Red Zone before being tackled. Northwestern would score on the next play, taking advantage of a missed assignment by the DE to the boundary and scoring on the bounce of a zone play. 14-3 Wildcats.

After Pitt scored quickly to bring the game to within four, Northwestern quickly turned back to attacking Pitt out of 11 pers. Trey. When the Wildcats lined up in 10 pers. 2×2 and motioned the H-back into the formation Narduzzi called a timeout. Out of the timeout, the Wildcats went back to the formation, but Narduzzi had changed the coverage to a Read Coverage. Assuming Narduzzi knew that Northwestern felt Pitt had made adjustments to the Trey set and was now switching to a new look, he called a quick timeout after seeing Northwestern align in 20 pers. Out of the timeout, Narduzzi switched to Read Coverage to combat Northwestern’s new set to take advantage of the soft spot to the outside in Pitt’s Quarters coverage. This small sequence highlights the constant cat-and-mouse game that is football and a great change-up coverage to split field quarters versus 20 pers.

Continue reading “Defending 20 Pers. With Read Coverage”