IRVING, Texas -- It sounds cliché, but stopping the run is vital for most NFL defenses.
The Dallas Cowboys have pretty much mastered that. Their run defense has allowed just three running backs to gain more than 100 yards in the past 20 games.
Two of them, the Baltimore Ravens' Le'Ron McClain and Willis McGahee, did it in the same game against the Cowboys back in 2008. Last season, the Cowboys were the only team not to allow a 100-yard rusher.
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