Unfortunately, concussions have been a problem for Kevin Kolb through his entire career.
Even as a Philadelphia Eagle, as he was taking the reins from a recently traded Donovan McNabb, he suffered the repercussions of the devastating injury.
The very first game of the 2010 NFL season saw Kolb being slammed to the ground by Packers linebacker Clay Matthews and suffering a concussion, allowing Michael Vick to start. The rest, of course, is history.
Last season with the Arizona Cardinals, he suffered an injury and sustained concussion-like symptoms, forcing him to miss the remainder of the season.
Fortunately for Kolb, the bench might suit him better now that he is the presumptive second-string quarterback.