Romo, making a brief appearance to start the contest, passes for 30 yards while his backup, Orton, went 7-of-12 through the air with one interception.
Orton drove the Cowboys 67 yards to open the third quarter, ending with the game's only score -- a 33-yard field goal by Dan Bailey.
Jamize Olawale rushed 12 times for 42 yards in the Cowboys' win.
Carson Palmer completed 3-of-6 passes for 33 yards and was intercepted once for the Raiders.
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