Edge rusher Von Miller, still recovering from having surgery to repair a torn ligament in his right knee in December, is one of three Buffalo Bills players set to open training camp on the active/physically unable to perform list. The team on Tuesday also placed defensive tackle Jordan Phillips and linebacker Tyler Matakevich on the PUP list without disclosing their injuries. Miller’s timetable, however, is more uncertain with the potential of him missing the start of the season.