I got my answer: Derek Ponamsky: Eric Reid dressed out, but not running with first unit. Claiborne and Simon at corner, Mathieu and Brooks at safety with 1s. https://twitter.com/#!/DerekPonamsky Brooks would take over at nickel, where we know he is just as effective as Mathieu, so no loss there. I suspect Martin in the dime package (and probably explains the pulling of the redshirt last week). I am not worried about the situation now. I think it's the smartest rearrangement of the secondary based on the opponent. I would not have trusted Loston in this game taking the majority of the snaps at FS.
That gives TM7 the chance to do what he does best and free style. Also gives us more pass defenders for the piggie pass game.