Teaching the Corners
Four Read (Sky)
The corner’s alignment in Sky should be front toe at six yards and shaded to the “inside eye” of the receiver. The term “inside eye” means if the CB were to walk up to the WR his outside eye should look directly into the inside eye of the WR. This allows the CB to hold inside alignment without giving up too much space in between. Six yards is a good depth because it is not too deep that it automatically gives up the underneath and not too close that the CB ends up in “no man’s land.” The CB’s stance is an “open” stance or the inside toe on the heel of the outside foot. I’m not a big proponent of getting the butt to the sideline and shuffling out (basketball style) because match quarters is different than true zone. It is essentially a hybrid man scheme, where the CB takes the #1 WR a majority of the time (and the safeties bracket the #2 WR with the outside linebackers). I like to keep my corners square in order to break on the out and slant routes. I find that as players shuffle out basketball style and butt to the sideline, they start working to the sideline and give up the advantage of inside alignment. The point of match quarters is to force the least percentage throw, the fade or deep comeback, thus, I keep them square and we “slide” out.
The initial step of the CB is to slide out, or step-replace for three steps. Most offenses will attack quarters in the soft underneath zone. The slide technique is essentially a three-step read. We are pushing off with the front foot and stepping back with our inside foot. These are quick steps and our feet are never too far off the ground. The corner should have “hot” feet and stay in his “tuck.” This positioning allows the CB to drive on any ball underneath, essentially off-man. After the initial three-step read, the CB transitions into his regular backpedal, reading the WR’s departure speed.
The CB’s eyes are looking at the #2 WR through the QB. This completes his “triangle.” It is important for the corners to be able to see through their entire peripheral vision. Keeping an eye on the departure speed of #1, while reacting to the route of #2. In Sky coverage, the CB is the deep player. His responsibility is to “top” the deepest route or drive on anything underneath by the #1 WR. The only route combination that changes the assignment of the CB is a stop/corner, or China/Smash route. In that case, the CB would give a “stop” call, flip his hips to the sideline and mid-point the stop and corner route (same as in Cloud or Two Read). If the team is running a stop/bender concept to hold the OLB in the curl, the CB should drive on any ball thrown to the #1 WR. Everything is predicated on the #2 WR. In the video below you will see a good example of sliding out and keeping inside leverage by the field corner.