According to Tim Graham of the Buffalo News, the Bills are worried that Kevin kolb’s career could be over after suffering another concussion.
Source tells me Bills concerned Kevin Kolb's concussion may be career-ending and they're proceeding with that in mind.
— Tim Graham (@ByTimGraham) August 25, 2013
Kolb is like the Jahvid Best of quarterbacks. He has a knack for suffering concussions.