Addai has suffered an injury which the doctors think is just a nerve, but he will be receiving a second opinion on his injured shoulder.
Team president Bill Polian talked about Addai's injury on his weekly radio show, saying, "It's not a separated shoulder or anything like that. That's kind of the good news. They're doing more tests and we'll know more later in the week."
But, Addai has a little more to say on the injury telling the Indianapolis Star: "Nothing is torn or anything. It's just the nerve. That's the biggest thing, that and getting the strength back. It could come back any time between now and four or five weeks."
If Addai is on your roster he should be sat for the next couple of weeks. You might even want to release him and add a "sleeper" running back to your team, such as Chris Ivory. Sure, Addai had his best game of the season last week carrying the football 17 times for 128 yards and a touchdown, but if he does end up sitting out four to five weeks, he really isn't worth the wait.