Porter, who had a sack and forced fumble in the first half against the Chargers, has been bothered by the injury for a couple of weeks.

Teams no longer have to provide availability categorizations (out, doubtful, questionable or probable) until Friday, but his absence from practice would seem to indicate he's a question mark for Sunday's home game against Buffalo.

If Porter can't go against Buffalo, look for Charlie Anderson to start in his spot at weakside linebacker.