Part 7/12:
When the defensive line and linebackers are fully covered, the "jam" and "5" calls are used to inform the offense that man-to-man protection will be in effect with no help, requiring individual battles to be won.
When a linebacker lines up directly over the center, called "jam, jam, jam," the offense responds with "5," signaling a five-on-five situation without assistance, allowing for precise man-to-man blocking.
In situations where the defense sends a linebacker on a blitz, the quarterback must identify the "hot" receiver and decide whether to throw quickly, scramble, or throw the ball away.