The NFL Tried To Drug Test Chris Borland A Month After He Retired
Gone too soon: Sport's most stunning early retirements - NZ Herald
Chris Borland, Fearing for Health, Retires From the 49ers. At 24
Chris Borland finding life after football isn't easy
I AM IN PAIN HEAD TO TOE - PressReader
NFL doctor: CTE 'rare,' football safe - ABC7 New York
NFL star Chris Borland quits over head injury concerns - CBS News
NFL rookie Chris Borland on retiring over concussion concerns
Athletes who retired early
Chris Borland's Retirement an Uncommon Choice—but One NFL Players
Opinion A Football Player's Safe Exit - The New York Times
No regrets for Chris Borland after walking away from 49ers