Turpin (ribs) was a non-participant in practice Thursday, Tommy Yarrish of the Cowboys' official site reports.
Turpin was also a DNP on Wednesday, though that was a walkthrough. The Cowboys held a standard practice Thursday, and Turpin was unable to participate, casting doubt on his availability for Sunday's game against Arizona. Still, Turpin will have a chance to log at least a limited session Friday ahead of the weekend.