Tune is slated to start Sunday's preseason finale against the Broncos, Ian Rapoport of NFL Network reports.
With Kyler Murray not in line to see any exhibition action, Tune will get the starting nod Sunday and will be followed by Desmond Ridder. Tune and Ridder remain in contention to work as Murray's top backup, though Rapoport suggests that the Cardinals could elect to keep all three QB's on their initial 53-man roster.