Former Arizona Cardinals offensive coordinator Keith Rowen has filed a grievance with the NFL over the circumstances surrounding his demotion. Team spokesman Mark Dalton confirmed that Rowen had filed a grievance but had no other comment. No date has been set for the case to go before an arbitrator. Coach Dennis Green stripped Rowen, a 23-year NFL coaching veteran, of his offensive coordinator duties on Oct. 17, a few hours after the Cardinals blew a 20-point lead in a 24-23 loss to the Chicago Bears on Oct. 16.