The Cowboys today called up defensive tackle Ken Bishop to the 53-man roster. The move is an indication that DT Terrell McClain, who is dealing with an ankle injury, is unlikely to play on Sunday. McClain hadn't practiced with the team all week, and Bishop had taken second-team snaps at DT all through practice, so the Cowboys had been preparing for this eventuality.
With DT Henry Melton on injured reserve, Bishop will be the fourth man in a defensive tackle rotation that includes Tyrone Crawford, Nick Hayden, and Josh Brent.
Nominally, that leaves Tyrone Crawford as the only 3-technique among the defensive tackles. However, DE Jeremy Mincey has often moved inside to DT, especially in nickel formations, to provide some extra pass rush.
Bishop, a 2014 seventh-round draft pick, was on the active for three of the first four games of the season before being moved to the practice squad, where he's been making some noise.
To free up a roster spot, the Cowboys released safety Jakar Hamilton. After sitting out the first four games Hamilton due to a suspension, Hamilton was active for two games this season.