I don't understand why everyone is so down on Smith. He was a solid QB before the calf strain. I fully agree that he looked very immobile yesterday.I think they make an effort to upgrade QB no matter what happens.
The key question: is the calf strain related to his leg injury? If he is prone to injuries like this due leg injury, he needs to seriously consider retirement. If he and the medical staff views it as a one off injury, then there is no reason he can't heal from it.
Chris Collingsworth did say that Smith wears the brace due to "dead foot" he his muscles can't bring the foot to a normal position. That sounds scary on the football field.