Should the NFL be Afraid of Chris Borland?
Clip: Season 32 Episode 2 | 6m 9s
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 growing concussion crisis.
Aired: 12/21/15Video has closed captioning.