I might be reading a little too much into this but there were some photos on ND Football's facebook page from Sunday night. In this picture it appears to be the 1st team offense and the 1st team defense, correct me if I'm wrong, and that appears to be Rees lining up with them. You can't see his number, but in the other pics Dayne is wearing a knee brace and this player obviously is not. Kelly said that he was going to decide over the weekend so I wonder if this carries any weight.
Notre Dame Football's Photos - August 21, 2011 | Facebook
It was simply a snapshot in time.
As for the brace any coach that doesn't have a guy coming off surgery wear one should clean out his office. It's S.O.P. None of us know just how mobile Dayne is today compared to pre-injury. The presence of a brace doesn't indicate anything other than the medical staff is being prudent.