A little something...
BY TY SCHALTER
Getting to the quarterback has never been more important than it is today in the NFL. Modern passing schemes get rid of the ball so quickly, to so many targets, in such complicated route packages, NFL secondaries can't possibly stop them for four quarters.
That's why the best pass defense isn't defense at all: It's attacking the quarterback.
There are many different ways to bring heat: inside, outside, from the line, from the blitz, out of a 3-4 or 4-3 alignment. But what's the difference between all these? What are the advantages and disadvantages? What's the most effective way to rush the modern NFL passer?
Read the rest here http://bleacherreport.com/articles/1289011-showcasing-the-biggest-differences-in-the-4-3-and-3-4-pass-rush