Chris Borland Retires from NFL at Age 24: Latest Details, Comments and Reaction, News, Scores, Highlights, Stats, and Rumors
Lowell Cohn: Chris Borland's retirement a choice to admire
Retiring 49er Chris Borland to pay back NFL signing bonus - Sports Illustrated
49ers' Chris Borland, 24, retires because of brain injury concerns - Los Angeles Times
Chris Borland's Early NFL Exit Doesn't Mean Avoiding Brain Damage, Experts Say - ABC News
Borland Effect' A Fumble For Football? Deford Says It Will Pass
Wary of head trauma, 49ers linebacker retiring at 24
49ers' Chris Borland, 24, quits NFL over concussion worries
Chris Borland retires from NFL at just 24 years old, makes his own sense of head injuries – New York Daily News
Chris Borland stuns 49ers with retirement announcement
NFL community reacts to Chris Borland's retirement
Chris Borland, 24, to retire from NFL, cites fear of concussions