As per ESPN/SI - ND's backup center Dan Wenger has suffered another concussion and will likely not play against Michigan. He was supposed to be the starter as per Irish's breakdown of ND Offense here on MGoBlog - but he was passed over because of the first concussion in practice. The second concussion essentially eliminates him from considertation against Michiagan.
Obviously, hope Wenger recovers and there are no long term ill effects. Though you do have to think that in an already inexpeciened O-line, missing a fifth year senior is not very good for ND.
Thoughts on how this will affect the game?