IRVING, Texas -- Already missing both of their punters, the Cowboys were also without outside linebacker Anthony Spencer for Wednesday's practice.
Spencer missed the Week 4 game against Chicago with the pectoral muscle injury, but there is a chance he could practice at some point this week.
Victor Butler would take Spencer's place if he is unable to play.
Center Ryan Cook (hamstring) also missed practice Wednesday.
Alex Albright (stinger), Miles Austin (hamstring), Kenyon Coleman (knee), Phil Costa (back), Matt Johnson (hamstring/back), Jay Ratliff (ankle) and Marcus Spears (knee) are listed on the injury report but practiced fully.
Not having Spencer in a road game at Baltimore could hurt the defense. Butler recorded just one tackle against the Bears.