Lions' Alex Anzalone: Begins Week 18 prep as DNP

Anzalone (concussion) didn't practice Wednesday.

Anzalone suffered a concussion against the Vikings on Christmas Day. To have any chance of playing in Sunday's season finale against Chicago, he'll need to clear the NFL's five-step concussion protocol. If Anzalone can't suit up for that contest, Malcolm Rodriguez will likely get a start at linebacker for the Lions.