A lot of people think audibles are just play changes, while some of them are, that just scrapes the top of the potential of what they can be. Whether it is Peyton Manning calling out Omaha 46 times or just a simple hand gesture, it can mean the world to an offense. An offense in football is like a working clock, if one cog is out of rhythm the whole clock is out of rhythm. When the offense is out of rhythm you see a Super bowl like you did on Sunday. The offense is so complex it takes years to be able to reach full understanding of not necessarily what the audibles are, but why they are used in a certain situation.
A complete audible or play change in football is made when the quarterback analyzes and sees something in a defense he does recognize or like. Whether he changes to a run because he sees a linebacker or defensive back pressing or a pass when he sees a breakdown in coverage it is all made when the quarterback notices something in the defense. All audibles on offense come from something seen in the defense, never something seen on its own side. Quarterbacks usually communicate with their offensive line first to let them know of a play change, as they are the ones going to protect him, and then he barks out the play change to anyone on the edges like Tight ends or other receivers, and lastly his running back. Sometimes audible can result and touchdowns and sometimes they can result in interceptions for touchdowns, it all depends on if what the Quarterback sees is a whole or a disguise from the defense.
If your Pro Bowl stud wide receiver is going up against a struggling rookie cornerback the chance is you’re going to want to get him the rock, and a hot route will allow him the greatest chance to beat his defenders coverage. A hot route is an audible or change to a receivers route he will be running. These audibles are used only on pass plays. They can use numbers, colors, or even names to give a hot route to a certain receiver. A hot route is used when there is a mismatch in coverage; a blitz is shown or even completely blown coverage. When a blitz is shown and the quarterback wants to pass he will usually call a hot route on a slot receiver and change his route to a quick route. This way the quarterback can get the ball out of his hands without getting sacked. A hot route can turn a 90 yard fly route into a 5 yard quick slant; again it all depends on what the defense is showing the quarterback.
When playing a defense it is likely they will try and put as much pressure on the quarterback as possible,...