Coach Doug Marrone said he's still unsure whether Kevin Kolb (concussions) will resume his playing career. Kolb has suffered numerous concussions in his football career, with the latest coming in the third preseason game this past year. He spent the season on injured reserve. Kolb has been increasingly slow to recover from the head trauma and will consider hanging up his cleats. If he decides to continue playing, it likely won't be in Buffalo. He has a hefty $3.6 million cap number.