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Evolution of the QB tree | NFL Explained

It has been dubbed the highest profile position in all of sports: the NFL quarterback. So it's time to see how the position has evolved, from a time when throwing the ball was rare, and considered an act of desperation, to an era where the pass has taken over as the way to move the ball on offense. See who the 10 most important QBs to ever have played the game are, while seeing which other signal callers over time followed in their footsteps. It's NFL Explained: Evolution of the QB tree!