Teams run empty backfields to isolate WRs and open the middle of the field. With more teams opting for athletic QBs, empty sets have become a way to expand the QB running game. Defensive coordinators that want to keep a six-man box are forced to run “Zero” coverage behind the front with help only coming by late support underneath from the inside linebackers (better to just send a six-man pressure and force an errant throw), or spin to single-high. Either way, “Zero” or single-high coverage, the defense is putting its defenders in one-on-one situations. Split field defense can adjust to any empty set, but it puts the ILBs in conflict. Following base Trips rules and running an Under Front versus Empty, the Will LB is responsible for the “A” gap yet has to cover down to the weak slot. This conflict can be used against the defense and is a primary example of why Empty sets are so hard to defend.
The sister formation to Empty is Quads. This set stresses the defense even more and forces the backside safety to become a box player. The Quads set shifts the defense to the four WR side. This shift puts the DS into primary fit support in the “A” gap and completely takes the Mike LB out of the fit (another reason teams like Quads). By taking a box LB out of his fit, the offense has now forced the defense into an uncomfortable situation. Spread teams also like Quads when they have a stud WR. By alignment alone, Quads forces a one-on-one situation to the single WR side. The DS still can help the backside CB, but with any run action by the QB, or a pulling Guard, the DS must honor his fit and work into the box. This allows a brief window in the middle of the field (high percentage throw). Whether 3×2 or 4×1, the offense can put immense pressure on defenses by eliminating the RB from the backfield. All is not lost, 4-2-5/4-3 split field defenses have several ways they can combat empty backfield formations without blitzing or dropping eight. Continue reading “Defending Empty and Quads Open”