Spector is considered week-to-week due to a calf injury, Maddy Glab of the Bills' official site reports.
Spector has been out of practice since last week and didn't participate in Buffalo's second game of the exhibition slate. It sounds as though he'll miss the team's preseason finale against Carolina on Saturday as well. The injury and missed time could result in Spector being left off the Bills' 53-man roster.