Dean (ankle) has been ruled out ahead of Sunday's game against the Colts, Mark Kaboly of 93.7 The Fan Pittsburgh reports.
Dean suffered an ankle injury during the Steelers' 27-24 loss to the Browns last Thursday. The cornerback has not practiced since sustaining the injury and is set to miss a few weeks as he manages the issue. Asante Samuel is set to start across from either Daylen Everette or Sean Murphy-Bunting in Dean's absence.