NFL Player Quits Over Concussion Risk: After eight seasons in the NFL, offensive lineman Jacob Bell is retiring from the NFL at age 31 because of the sport's concussion risks. "I've been thinking about some different things, thinking about health, thinking about the future of my family having to deal with some kind of crazy disease that nobody even knows about, where people want their brains studied after they're dead," Bell said. "Donating their brains to research. It's just crazy to see how someone like Junior Seau took his own life over -- God knows what he was really struggling and dealing with. But you have to believe it came from the game of football. I want to get out before the game makes me get out, where I can get out on my own terms, and I can limit the amount of stress and negative impact that the game would leave on me."