Lions end Kevin Smith's season

Sometime after I checked out Saturday afternoon, the Detroit Lions made a significant roster move. The team placed tailback Kevin Smith on injured reserve and promoted linebacker Caleb Campbell from the practice squad.

I guess it's possible that Smith's thumb surgery revealed a more significant injury than originally thought. But it's more likely that the Lions decided against carrying another longer-term injury on their 53-man roster. Already, quarterback Matthew Stafford (shoulder) and place-kicker Jason Hanson (knee) are in that category.

Smith had been working as rookie Jahvid Best's backup, but the drop-off from Smith to Maurice Morris and Aaron Brown probably isn't significant enough to continue carrying him on the roster. Campbell will give the Lions a fresh body on special teams and give them a chance to evaluate him in a regular-season environment over the last two months of the season.