Eagle cornerbacks are routinely asked to cover receivers man - to - man .
The wrinkles in the defensive playbook often create places where an extra safety or lineman who is dropping into a zone can pop up and try to catch quarterbacks off - guard .
Eagle cornerbacks are routinely asked to cover receivers man - to - man , but the wrinkles in the defensive playbook often create places where an extra safety or lineman who is dropping into a zone can pop up and try to catch quarterbacks off - guard .