Injuries have taken over as the top storyline in Dallas.
The Cowboys have ruled out defensive back Caleb Downs with a concussion.
The rookie first-rounder finished his day with four tackles.
The Cardinals have ruled out left tackle Jayden Williams with a knee injury. He is the second left tackle the Cardinals have lost this season, with Paris Johnson going on injured reserve after a season-ending torn left biceps in Week 4.
Josh Fryar replaced Williams.
The Cardinals had already ruled out running back Jeremiyah Love (ankle), running back Bam Knight (concussion) and wide receiver Kendrick Bourne (ankle).
They trail the Cowboys 27-17 with 3:54 remaining.