When we last talked coverage, we discussed the coverage rules and permutations of 2-read pattern matching coverages. I highly recommend reading that post before we dig into today’s topic — 4-read coverages!
Known to some as Quarters — or to Nick Saban as “Box” or “Mod” — 4-read coverages share a lot of similarities with 2-read. The same idea — driving on out routes with unexpected receivers — is very important to the function of the coverage. 4-read is typically an early down or red zone coverage, and Steve Spagnuolo uses it frequently in those situations.