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ESPN NFL analysts and former pros Mark Schlereth and Mike Golic step to the chalkboard to break down zone blocking running plays.

ESPN NFL analysts and former pros Mike Golic and Mark Schlereth step to the chalkboard to break down the 3-4 defense. Its goals are two-pronged: create blocking mismatches in the offensive backfield or reach the quarterback with timed blitzes.

Pittsburgh sophomore running back Dion Lewis, who rushed for 1,799 yards and 17 touchdowns as a freshman, talks with ESPN RISE about keys to protecting the quarterback against a blitz and the differences in blocking speed and power rushers.

Former Pro Bowl wide receiver Troy Brown talks with ESPN RISE about run blocking keys for wide receivers. He beats up former RISE intern Eric Lipkind, which in itself is fun to watch.

Running backs and linebackers battle in one-on-one pass blocking drill as ESPN RISE cameras roll at the Nike Football Training Camp at Stanford in Palo Alto, Calif. (Video by: Trey Barclay and Brian Inman)