49ers Chris Borland retires from football, citing concern over head injuries - Field Gulls
Borland retires at 24, citing health concerns
What It Means to Leave Football Early - WSJ
Hard Truth On Wisconsin Magazine
Chris Borland, Fearing for Health, Retires From the 49ers. At 24. - The New York Times
San Francisco 49ers LB Chris Borland to retire due to safety concerns - Sports Illustrated
Ex-49er Chris Borland still asked why he quit — and he keeps explaining – East Bay Times
Jim Harbaugh talks Chris Borland, Chris Culliver, DEA inspection, more - Niners Nation
Former Badger returns home with a mission, City Life
Chris Borland's NFL Retirement Cost Him Millions, But Could Add 2 Decades To His Life, Statistics Show
49ers ex-linebacker Chris Borland salutes Pat Tillman
49ers roster, 90-in-90 breakdowns: Chris Borland - Niners Nation
Ex-49er Chris Borland still asked why he quit — and he keeps explaining – East Bay Times
Former UW linebacker Chris Borland praises doctor in Time story
Retiring 49er Chris Borland to pay back NFL signing bonus - Sports Illustrated