Billy Volek also played under center for the Chargers, finishing 8-of-12 through the air for 48 yards, and Ryan Mathews ran the ball seven times for 35 yards and a score in San Diego's win.
Wide receiver Malcom Floyd, however, sustained a concussion after taking a hit from Cowboys safety Gerald Sensabaugh following an 18-yard pass reception from Volek.
Dallas signal-caller Tony Romo went 8-of-12 passing for 58 yards, a touchdown and an interception, while Stephen McGee made good on 16-of-29 passes for 157 yards for the Cowboys.
Dallas' Felix Jones compiled 56 rushing yards on seven carries.
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