Summers injury status???

Anyone heard the extent of the injury to Summers? Can't find anything on the net.

LB Matt Grootegoed, S Wes Lysack, SB Teyo Johnson and RB Demetris Summers did not practise yesterday. DL Juwan Simpson and DL Funtaine Hunter are back practising after Week 1 injuries.
It looks like day to day and are all expected back soon.