NFL sensation Chris Borland was known as a fearless player, but after just one season he retired because he was afraid of head injuries. Now, Borland is known as the most dangerous man in football, a powerful voice in the NFL's concussion crisis.
How many NFL players are suffering concussions every season? How are teams handling their injuries? "Concussion Watch" tries to answer these questions by tracking every officially reported head injury in the NFL.
The ruling by a U.S. judge ends a legal battle that has threatened to undercut the nation's adoration for professional football and sparked a debate about whether the sport on any level is worth the risk to players.