NFL head injuries

Saying it wants to make football safer for current and future athletes, the NFL is pledging to spend $100 million for "independent medical research and engineering advancements." A main goal will be to prevent and treat head injuries.

Announcing the pledge Wednesday, NFL Commissioner Roger Goodell said it is in addition to the $100 million the league already committed toward medical research of brain injuries and chronic traumatic encephalopathy, the progressive degenerative disease that has been found in football players.

Gregory Bull / AP Photo

Just days after the suicide of retired NFL star Junior Seau, a lot of people are wondering whether the head injuries he suffered on the field may have played a role in his death.