Updated: August 31, 2009, 11:18 AM ET
An illustrated guide to blocking schemes
What goes on in the trenches? Allow Football Outsiders to explain.
Every NFL fan knows that good offensive line play is vital to the success of their favorite team. But what, exactly, do those massive dudes do in the trenches? Here, Football Outsiders' Doug Farrar breaks down the basics of both man and zone blocking schemes and provides a few applications to watch for on Sundays this season.
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