Smith suffered the injury after posting just a single catch (albeit a long one, even though it didn't produce any points as the next play was a Cam Newton interception) on the day.
Later in the game Smith went to the ground and grabbed his knee on a non-contact play.
The good news for Carolina is they've shown the ability to put up points without Smith. Despite an ugly first half, they've got a 7-6 lead over New Orleans.
In the second half things could stay sloppy. The weather's not going to cooperate for the second half in Charlotte.