The Dallas Cowboys shuffle of their special teams will likely result in linebacker Curtis Johnson losing his spot. Johnson has had three special teams penalties, two on blocks, in the last three games. The other changes will be dictated by injury-driven switches in the starting lineup. With Alan Ball starting at free safety, reserve cornerback Orlando Scandrick will likely become the ``gunner,'' with outside coverage on punt-coverage teams. In addition, offensive tackle Pat McQuistan is scheduled to be active for the first time this season and replace Doug Free as a wall blocker on kickoff returns. Free is starting at right tackle in place of the injured Marc Colombo.