Theo Riddick's role is expected to take a hit following the selection of second-round RB Ameer Abdullah.
Coach Jim Caldwell expressed confidence in Theo Riddick last week.
Theo Riddick is expected to have the first shot at taking the snaps vacated by Reggie Bush.
Lions GM Martin Mayhew raved about Theo Riddick at the NFL Combine.
Theo Riddick secured 4-of-7 targets for 39 yards in the Lions' Wild Card Round loss to the Cowboys.
Theo Riddick caught 5-of-7 targets for 34 yards and a touchdown in the Lions' Week 17 loss to the Packers.
Theo Riddick had zero carries and caught two passes for 10 yards in Sunday's Week 16 win at Chicago.
Theo Riddick rushed once for four yards in Week 15 against Minnesota.
Speaking Thursday, Lions OC Joe Lombardi called Theo Riddick's one-snap Week 14 an "anomaly."
Theo Riddick didn't play a single snap on offense in Week 14.
Theo Riddick caught 6-of-7 targets for 54 yards in Detroit's Week 13 win over the Bears.
Lions RB Theo Riddick rushed twice for 12 yards and caught three balls for 40 yards in Sunday's Week 12 loss to the Patriots.
Theo Riddick caught 3-of-6 targets for 24 yards in Detroit's Week 11 loss to the Cardinals, adding two rushes for two yards.
Reggie Bush (ankle) will not play in Sunday's game at Arizona, leaving Theo Riddick in the passing back role.