Ash was a limited participant in practice this week after sitting out Week 16 to earn the questionable tag. Ash would be slated for an increased workload if able to suit up since David Irving (concussion) has already been ruled out.
Ash is listed as questionable for Sunday's game against the Seahawks with a shoulder injury, Gregg Bell of The Tacoma News Tribune reports.
Ash was a new addition to the injury report this week and did not participate at practice Thursday and Friday. The 25-year-old is trending in the wrong direction for Sunday's game, and the Cowboys could be forced to do some major reshuffling at defensive tackle with David Irving yet to clear the concussion protocol.
Ash signed a contract with the Cowboys on Saturday, Brandon George of The Dallas Morning News reports.
Ash was on the Cowboys' practice squad and has played a handful of games with the team over the past two seasons with six recorded tackles. The 25-year-old will likely serve as a depth option at defensive tackle with veteran Stephen Paea (knee) opting for retirement earlier in October.