It gives us no pleasure to report that our instincts were correct. According to Tim Graham of The Buffalo News, the Bills are indeed concerned that Kolb's latest concussion might be career-ending, and they are proceeding with that scenario in mind. A Bills source told NFL.com's Ian Rapoport, however, that it's premature for the organization to view the injury as the end of the line for the six-year veteran.
Manuel won't play in Buffalo's preseason finale, leaving Jeff Tuel, Matt Leinart and Lewis to handle quarterback duties.
Considering the health risks and Kolb's uneven play across 21 career starts, it's highly unlikely that he'll ever be viewed as a potential quarterback solution. He has to decide if it's worth risking brain trauma to proceed as a long-term backup.