Wood has entered the league's concussion protocol and has been ruled out for the rest of Saturday's preseason game against the Cardinals, Patrik Walker of the Cowboys' official site reports.
Wood spent some time in the blue medical tent before being taken to the locker room for tests. He will be held out for the rest of Saturday's game, and he'll have to clear the league's five-step concussion protocol in order to be available for Friday's preseason finale against the Saints.