Norris entered concussion protocol Thursday after sustaining the injury versus the Maple Leafs, Bill Hoppe of the Olean Times Herald reports.
Norris could be facing an absence depending on further tests. The 27-year-old will be at risk of missing Saturday's game versus the Canadiens at a minimum. If Jiri Kulich (undisclosed) is also out, Tyson Kovak would likely draw into the Sabres' lineup.