Over the years, the growth of statistical analysis in fantasy football has been incredible to watch with numerous web sites digging into some pretty in-depth metrics to use when analyzing the performance of both NFL teams and their players. However, as we have routinely pointed out, there are many pitfalls when looking at year-to-year numbers. Things change at a rapid rate in the NFL. Not only is player movement abundant, but the revolving doors we’ve seen for head coaches and their coordinators seem to be in a perpetual spin.

As a result, comparing performances between the different seasons can often be an exercise in futility. A running back who found success against a particular team one year cannot be guaranteed success the following season as, not only could the opposition change defensive coordinators and systems, but said running back’s team could have gone through its own changes as well. Or, that player could be on an entirely new team and thus play in a completely different system.

There’s that word again – system. We use it often. We may also refer to it as a scheme, but the fact remains that a team’s system probably has a greater impact on a player’s production than even that player’s level of talent. You can take a running back with mediocre talent and watch him excel if the coach’s system caters to the player’s strengths. Conversely, you can take a highly-talented player, put him in a system that doesn’t necessarily feature his strengths and watch his overall production suffer.

This is why we urge you to study each and every team’s system, both on offense and defense. From a seasonal fantasy standpoint, it will help you make the right selections on draft day. If you’re looking at the Ultimate Cheat Sheet and see two players you like in the same tier, knowledge of the system in which they play can prove to be the deciding factor. From a DFS standpoint, you’ll have a much better idea as to which offenses match up better against a particular opponent and be able to construct your lineup accordingly.

And that is what makes our Coaches Corner, so valuable. This isn’t just some draft guide you toss aside once you’ve had your draft. You’re going to be able to refer back to this article throughout the season as it will help you with your weekly research. Do you prefer to stream team defenses? This will help. Trying to decide which free agent running back is a better pick-up off waivers? This will help. Trying to decide whether it’s worth paying up for Travis Kelce on Draft Kings in Week 5 or if you should bargain-shop for a different tight end? Yes. This will help.

But before you dive into each team, it is important to understand the base offenses used around the NFL. Coaches may put their own spin on certain things, but everyone starts somewhere. Understanding the base offense a coach uses will help you understand why they call the plays they do and, more importantly, which players fit into a particular scheme better.

Types of Offenses:

West Coast Offense – Derived by Bill Walsh, this scheme puts more of an emphasis on passing than running and is focused on short, horizontal passing routes to stretch out the defense and ultimately open things up for longer run plays and longer passes. Many modern west coast offenses will utilize a strong ground attack along with the short passes (the infamous dink-and-dunk) to move the chains, but also to set up play-action for more chances downfield. Plays are called using a long string of words and numbers such as “flip left double-X jet 42 counter naked seven Z quarter.”

Air Coryell (a.k.a. Vertical or Timing Offense) – A combination of both deep and mid-range passing in conjunction with power running. The system uses a lot of motion and the passing is based on timing and rhythm with the quarterback actually throwing to a spot rather than to a specific player which helps to maximize yards gained after the catch. Plays are called with three-digit number such as “jet dart 272 Y-flat train.”

Erhardt-Perkins Offense – The original formula, which dates back to the 1970’s Patriots, focused on a run-first offense with a simplified, quarterback-friendly passing game. However, when Charlie Weis joined New England, he used it as a building block to develop a more modern version which maintains the run but now enhances the multiple passing options and possibilities within a given play. Running backs, wide receivers and tight ends aren’t as much positions as they are labels for where a player lines up most of the time. Plays are called using short phrases and code words such as “Circus/Kings.”

Spread Offense -- The Spread offense is designed to do exactly as it sounds. The scheme spreads out the offense with four or five receivers, which forces the defense to match. The personnel on the field rarely changes so the offense can wear the defense down, especially with no huddle sprinkled in.

Air Raid Offense – The system is notable for its heavy focus on passing and, if implemented in full, could result in 65-75% passing plays throughout the season. This is an up-tempo, no-huddle scheme where the quarterback has the freedom to audible to any play based on what the defense is showing at the line of scrimmage. One interesting aspect you will see here as well is that the offensive linemen are not bunched together like you see in a conventional offense. They are split about a half-yard apart which is supposed to cause defensive linemen to run further to get to the quarterback and allow for short, quick passing to neutralize blitzes. It is also used to open up wider passing lanes which should prevent passes from being knocked down or intercepted at the line of scrimmage.

Pistol Offense – An offensive scheme which became more popular in the NFL with the rise of more athletic, mobile quarterbacks. It’s less of a base offense and more of an adaptation as its formation is a hybrid of single-back formations and shotgun. The premise of the scheme places the quarterback and running back closer to the line of scrimmage (about four yards behind instead of the usual seven) which should give the quarterback an easier read and less time for the defense to react. Its success really depends on the quarterback’s ability to read the defense properly.

Types of Defenses:

3-4 – Focus on size and length across the defensive line, inside linebackers ball-hawk, outside linebackers make plays as edge defenders and there is a heavy use of defensive backs to cover in the open field which helps disguise the blitz better.

4-3 – With four lineman and only three linebackers, the defenders are each responsible for covering a gap during a run and will usually set up with a closed formation on the opposing tight end. Pre-game prep and opposing personnel will determine which side the line will close if facing a two-tight end set-up.

Cover-2 – a two-deep, five under zone defense used to take away vertical concepts while forcing the ball underneath to the flat or check-down option.

Cover-3 – a three-deep, four-under zone defense where both cornerbacks drop to the outside zones with the free-safety playing the deep middle.

Personnel Packages:

Here's an easy-to-use chart to identify which personnel package is being used by the players lined up on the field.

FormationRBWRTE
23203
22212
21221
20230
13113
12122
11131
10140
02032
01041
00050