Chris Borland retires from NFL aged 24
He Gave Up MILLIONS…The Story of CHRIS BORLAND
Bills LB Tarpley cites 2 concussions as reason to retire, Sports
Chris Borland Archives - Jeffrey Sterling, MD
For Chris Borland, leaving NFL is not about the money
Chris Borland slams Wisconsin football program in Netflix doc
Ex-49er Chris Borland still asked why he quit — and he keeps explaining – East Bay Times
Chris Borland: NFL player quits over concussion fears - BBC Sport
Chris Borland retires from NFL at just 24 years old, makes his own sense of head injuries – New York Daily News