Zenner is poised for an increased workload Sunday against the Bears due to Theo Riddick's (wrist) placement on the inactive list.
Zenner led the Lions in carries last Sunday at New Orleans with Riddick available. Now that Riddick is donning street clothes in Week 14, his 14.5 touches per game are up for grabs. Fellow backup RB Dwayne Washington is best served in a change-of-pace role, which makes Zenner the leading contender to receive many of the carries between the tackles.