I retired from the NFL after one season - I was dubbed the most dangerous man in football after revealing my reasons why
Is Chris Borland an outlier or the start of a trend? With concussion risks still uncertain, it's tough to say
Head injuries a growing concern for young athletes - ABC7 Chicago
Ex-49ers LB Chris Borland doesn't think football can be saved
San Francisco 49ers linebacker Chris Borland retires over head injury concerns - ESPN
San Francisco 49ers linebacker Chris Borland retires over head injury concerns - ESPN
Chris Borland Doesn't Trust the NFL & Attacks Football As A Sport - Movie TV Tech Geeks News
Why the NFL Should Be Scared of Chris Borland
Chris Borland Blasts N.F.L. for Hiding C.T.E. Risks - The New York Times
49ers LB Chris Borland won't be last to retire early for safety reasons - Sports Illustrated
FRONTLINE, League of Denial: The NFL's Concussion Crisis, Season 2013, Episode 16
The 'most dangerous man in football' traded an NFL career for an internship - The Washington Post
Chris Borland Blasts N.F.L. for Hiding C.T.E. Risks - The New York Times
San Francisco 49ers' Chris Borland reveals a concussion during camp made him walk away
NFL star Chris Borland quits over head injury concerns - CBS News