Before I get into Cover 3 Details I should give you the basics and reading coverages. As you come up to the ball you should:
1. Look at the Safeties first. They are usually a good tell as to what coverage the D is
playing.
- If we see 2 safeties up top we know it can be one of 2 coverage variations (a version of cover 2 or cover 4)
- If we see 1 Safety up top we know it will be either a Cover 3 or a Cover 1
- If we see no true safety up top and the Safeties are tight (7 yds or in) you better believe it's man coverage and expect a blitz
what's our next tell? The CB's will be our next read.
2 Safeties on Top
- If the CBs are hovering around 5 with their eyes inside we know it's a base cover 2
- If the CBs are at 5 or tighter with their eyes on the WR its a Cover 2 with man coverage underneath
- If the CBs are back (7+ yds) we know its a Cover 4 or quarters where each member of the secondary has 1/4 of the field
1 Safety
- If the CBs are playing (6-7+) we can be confident we are seeing a version of Cover 3 where each defender has 1/3 of the field
- If the CBs are playing tighter than 5 yds with their eyes on the WR it will be a Cover One where we have man cover with a S helping over the top
UNDERSTAND: The defense will often try to disguise the coverage (as we do) by stemming into it. For example, from a Cover 2 look and rolling to a Cover 3 as Alabama does in this cut up.
Cover 3 is generally an easy coverage to recognize. It should also be a fairly easy one to attack. Our flood and smash concepts (Spread Quick Flood, Power Pass and 88/87 Smash and Whip) all put the CB in a bind to cover the high route behind and the underneath in the flat. As you can see in the diagram above the SS and Weakside LB are responsible for the flats. All of our combos should by alignment and personnel should give us the ability to hit the flat route faster than the LB or SS can play it.
There are other route combos that can attack a cover 3 very well including: 4 verts, Curl/ Flat combos, Deep ins and Deep outs and 3 step passing (hitches and outs especially).
Hopefully this gives you guys a basic understanding of what we'll see Thursday and often this year. This should helps us make reads and route adjustments more effectively and we will definitely throw in more wrinkles to attack this coverage as the year goes on.
Here's some video of Cover 3 in action