Norris entered concussion protocol Thursday after sustaining the injury versus the Maple Leafs, Bill Hoppe of the Olean Times Herald reports.
Analysis: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.
