The 46 Defense and the Bear Front
The 46 is named for a jersey number, not a formation count. Learn how it crowds the line, why it was so disruptive, and what the Bear front is.
Most defensive fronts are named for what they contain. The 4-3 has four linemen and three linebackers. The 3-4 has three linemen and four linebackers. So when a fan hears "the 46 defense," the natural guess is four linemen and six something-elses. That guess is wrong, and the story of why it is wrong is the best way into the scheme.
The 46 defense is named after a jersey number. It was built around a strong safety who wore No. 46, Doug Plank of the Chicago Bears, and the coach who turned it into a weapon was Buddy Ryan, the Bears' defensive coordinator in the 1980s. The Bears of the mid-1980s, who won the Super Bowl at the end of the 1985 season, are the team most associated with it. The name stuck, and it now describes a family of aggressive fronts that crowd the line of scrimmage with eight or more defenders and send pressure from everywhere.
This article explains the idea behind the scheme, how it is aligned, what it asks of the secondary, why it fell out of regular use, and what the related Bear front means. As with all tactical terms, coaches use them with some variation, and the details below are the common version.
The idea in one sentence
The 46 is built on the observation that offensive linemen block best when the defenders in front of them are predictable. Move the defenders around, stack them close to the line, and the blockers cannot be sure whom to hit. If an offense cannot block everyone, somebody gets to the quarterback or the runner.
To do that, the defense moves its safeties up to the line of scrimmage, close to the linebackers, and often lines up as if every one of them might rush. The offensive line, counting defenders, sees more potential rushers than it has blockers, and it has to guess.
Where the number comes from
The jersey number is the whole origin of the name. Plank, the Bears' safety, played an aggressive, forward-leaning role, lined up near the line of scrimmage. Coaches began calling the alignment where a safety took that kind of position "the 46." After Plank moved on, the label stayed, and it was used for any similar alignment, regardless of who wore which number.
This means that the number says nothing about how many players are at each depth. Do not read "4-6" as four linemen and six linebackers. A modern fan who hears the phrase should think "safeties at the line, linebackers stacked up, pressure from anywhere."
Credit for developing the details of the scheme is generally given to Ryan, and the Bears' defense of that era is the best-known example. Other coaches had experimented with similar ideas, and accounts vary about who did what first, so it is best to treat the Bears and Ryan as the best-known source rather than the only one.
The alignment
The commonly described 46 has the following features.
- Four linemen, lined up over or shaded toward the offensive linemen so that blockers in the middle are occupied.
- Three linebackers, positioned close behind the line, with the middle linebacker free to attack in either direction.
- Two safeties moved up near the line, so that the defense has eight defenders in or near the box.
- Two cornerbacks left alone on the outside, usually in man coverage against the wide receivers.
That is a lot of defenders near the line. There is no deep help. If a cornerback loses his receiver, nothing stands between that receiver and the end zone, which is the central gamble of the scheme.
The front is often described as strong side and weak side, relative to the side with the tight end. The defense can shift its tackles and safeties toward the strong side to overload it, or toward the weak side to surprise the offense. In practice, the alignment changes from play to play, which is part of the disguise.
What the linemen do
The defensive linemen are asked to take on blockers and stay in their gaps. In the 46, the intent is for the linemen to occupy the offensive line so that the linebackers and safeties are free to make plays. The interior linemen are usually positioned over or on the shoulders of the center and guards, so those blockers have to deal with a defender immediately.
This is why the front is sometimes called a "bear" look: the line is covered across the middle. When every interior blocker has a defender directly in front of him, no one is free to block a linebacker. The linebackers can run straight at the ball without being intercepted by a blocker, and the defense can send a linebacker or a safety through a gap unblocked.
What the linebackers and safeties do
The linebackers are the playmakers. With the line holding blockers, a middle linebacker with good instincts can attack the ball carrier or the quarterback without being blocked. The outside linebackers can rush off the edge or play run support.
The safeties are the unusual part. Instead of standing deep, they line up near the line and either rush the quarterback, defend the run, or drop to cover a tight end or running back. Because they are so close to the line, they can reach the backfield quickly. The offense does not know until the snap whether a safety will rush, cover or support the run.
The strong safety is often the player who takes on the tight end or fills the C gap on a run. For the vocabulary of gaps, see blitz types and pressure packages.
The coverage behind it
With so many players near the line, the secondary is thin. The cornerbacks are usually in man coverage with no safety help over the top. That is the same idea as the zero-pressure calls described in Cover 1 man-free explained, but with even less deep protection.
Man coverage on the outside means the pass rush has to reach the quarterback before the receivers beat the corners. This is why the scheme is built around speed of pressure: the quarterback has to be hurried, hit or forced to throw early. If the pressure arrives in time, receivers do not have time to run deep routes.
Why the 46 was so hard to block
The scheme made life difficult for offenses for several reasons.
- Too many threats. The offensive line had to identify more potential rushers than blockers.
- Unblocked linebackers. With the interior line occupied, linebackers could reach the ball carrier with little contact.
- Gap confusion. The defense could shift fronts or send different players on each snap, so blockers could not rely on assignments from film.
- Run defense. Eight defenders at the line made it hard to run inside or outside.
- Quarterback discomfort. A quarterback who faces a wall of defenders near the line and cannot tell who will rush becomes tentative.
The result, when the scheme was working, was a defense that looked as if it had more than eleven players, collapsing the pocket and tackling runners for no gain.
A hypothetical third-and-four
Say the offense faces third-and-four with a tight end, two wide receivers and one back. The defense shows eight players within a few yards of the line, including both safeties, and the middle linebacker is in a stance that suggests he could go anywhere. The center, scanning the defense to set the protection, counts more possible rushers than there are blockers.
At the snap, a safety and an outside linebacker rush from the strong side, the weak-side safety fakes a rush and drops to cover the tight end, and the middle linebacker fires through the gap that the occupied guard cannot reach. The quarterback has about two seconds. If the slot receiver is open on a quick route against the single corner, the offense converts and the defense has been burned. If not, the quarterback is hit as he throws.
The same snap can produce either result, which is why coordinators who use these looks do so selectively.
Why it declined
The 46 asks a lot, and it has real weaknesses.
- Vulnerable to the deep pass. With no deep safety, a beaten cornerback gives up a touchdown.
- Dependent on exceptional players. The scheme requires linemen who win battles, linebackers who read plays quickly and corners who stay with receivers.
- Weak against quick passes. A quarterback who releases the ball in a second or less can beat the rush, and the receiver then has the corner's cushion and open field.
- Vulnerable to spread formations. Putting three or four receivers on the field draws defensive backs away from the box and forces the safeties to choose between covering and rushing. The safeties' proximity to the line becomes a liability when they need to cover receivers.
- Draws and screens. Defenders who rush upfield leave space behind them.
- Tired bodies. Aggressive, high-effort defenses can wear out over a game.
As offenses moved toward three- and four-receiver sets, the traditional 46 became harder to run as a base defense. The evolution of defenses from heavy fronts toward nickel packages is covered in the evolution of defense, and the 46 sits on the aggressive end of that history.
The Bear front
The Bear front is related but not identical. The name is borrowed from the Chicago team and refers to a particular alignment of defensive linemen: defenders are placed so that the center and both guards are each covered, with additional defenders on or near the tackles. The result is a wall of defenders across the interior of the offensive line.
Different coaches define the Bear front differently. In some playbooks it means three defenders over the center and guards plus defenders over the tackles; in others it refers to a specific set of shades. If you encounter the term, check the program's own definitions.
The idea of the Bear front is simple: if all the interior blockers are occupied, they cannot get to the linebackers, and the offense has fewer ways to run inside. It is typically a run-stopping alignment, and it appears most often in short-yardage and goal-line situations. A team may line up in a Bear front on third-and-one or at the 2-yard line, because the offense has a short distance to go, a power run is likely, and the defense wants every gap filled.
The 46 and the Bear front share a goal, which is to put a defender in front of every blocker and let the linebackers run free. The 46 is the full defensive scheme, including safeties near the line and man coverage outside. The Bear front is the line alignment, which can be combined with several coverages.
Where the ideas live today
You rarely see the full 46 used as a base defense in the NFL, and most teams today build their defenses around nickel and dime packages that match the number of receivers. But the concepts have not disappeared.
- Pressure from a safety at the line remains a staple of modern blitz packages.
- Bear alignments appear in goal-line and short-yardage packages at all levels, from the NFL to high school.
- Disguised fronts continue to be a way for defenses to hide where the rush will come from. The idea of hiding who will rush is shared by many modern pressure calls.
- Eight-in-the-box thinking, the notion that stopping the run requires numbers at the line, is part of every defensive coordinator's vocabulary.
Some high school and college programs still run versions of the 46, especially when they face run-heavy opponents. How common it is depends on the region and the level of play.
Common misunderstandings
- "The 46 means four linemen and six linebackers." It does not; the name comes from a jersey number.
- "The 46 is just a blitz." It is a front and a philosophy: crowding the line and keeping blockers uncertain. A blitz is one tool within it.
- "The scheme was unbeatable." It was extremely effective with the right players, and it had clear weaknesses that offenses learned to attack.
- "The Bear front and the 46 are the same thing." They are related, but the Bear front is the line alignment and the 46 is the larger scheme.
- "It only works with future Hall of Famers." Good players help any scheme, but the structure itself can be adapted by programs with strong lines and quick linebackers.
How to recognize it
Look at the defense before the snap. If both safeties are standing within a few yards of the line of scrimmage, the linebackers are close behind the line, and the cornerbacks are alone outside, you are probably looking at a 46-style look. Check the interior: is the center or guard covered by a defender directly in front of him? If so, you are looking at a Bear-style front.
Then watch the snap. See who rushes, whether anyone drops, and how fast the receivers reach their routes. The result will show you whether the scheme works that day. Look up the teams on the teams page and follow games through the scores page. If you want to understand the sport from the ground up, the Play section is a good place to start.
The short version
- The 46 is named after a jersey number, worn by Bears safety Doug Plank; it does not mean four linemen and six linebackers.
- It places safeties near the line, occupies interior blockers and sends pressure from unexpected places.
- The cornerbacks usually play man coverage with no deep help, which is its biggest gamble.
- It is hard to block and strong against the run, but weak against quick passes, deep balls and spread formations.
- The Bear front is a line alignment that covers the center and both guards, used today mainly for short-yardage and goal-line situations.
- The full 46 is rare as a base defense, but its ideas still shape modern pressure and goal-line packages.