The Cowboys downgraded cornerback Joey Porter Jr. to a limited participant in Thursday’s practice.

Porter, who has had an ankle injury since Week 6, was a full participant on Wednesday.

Porter played less than 50 percent of the defensive snaps in two of the three games he’s played since. He played 36 snaps in Week 6 against the Packers, 51 in Week 7 against the Eagles and 36 in Week 8 against the Cardinals.

The Cowboys added linebacker DeMarvion Overshown to the practice report with back and hamstring injuries. He was limited.

Defensive back Caleb Downs (concussion/ankle) and safety P.J. Locke III (concussion) returned to limited work after missing Wednesday.

Offensive tackle Broderick Jones (personal), outside linebacker Von Miller (rest) and linebacker Dee Winters (calf) were upgraded to full participants. Jones and Miller missed Wednesday’s session, and Winters was limited.

Tight end Jake Ferguson (ankle), outside linebacker Malachi Lawrence (ankle) and wide receiver KaVontae Turpin (ribs) did not practice a second consecutive day.

Wide receiver George Pickens (hamstring), tight end Luke Schoonmaker (groin) and left guard Tyler Smith (ankle) remained limited.