Starting safety J.J. Wilcox injured his knee during Thursday's practice and is expected to miss Sunday's game against the Lions. Wilcox has started the past five games making 28 tackles this season.

Undrafted rookie Jeff Heath likely will start at strong safety if Wilcox can't play. Heath played 24 snaps last week getting in plays at both safety spots.

Starting cornerback Morris Claiborne missed practice with an illness.

Receiver Dez Bryant (hamstring/wrist) returned to a full practice after being limited Wednesday but receiver Miles Austin (hamstring) remained limited for a second day in a row. Defensive end DeMarcus Ware (thigh) rehabbed on the side during practice. Linebacker DeVonte Holloman (neck) also missed practice.