IRVING, Texas—For one season-salvaging drive, the Dallas Cowboys looked like the kind of team everyone expected.

They made good blocks. They made tough plays. When coaches gambled, players delivered.

And, most of all, they won.

Dallas protected a 14-10 victory over the Washington Redskins on Sunday night by turning to Marion Barber and the offensive line. Combining punishing blocks and Barber’s rugged running, the Cowboys drained the final 6:40 off the clock, preventing the Redskins from even having a chance to come back.

“We just proved that whe...

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