Why Chris Borland's Retirement Should Terrify The NFL : r/nfl
Chris Borland's NFL Retirement Cost Him Millions, But Could Add 2 Decades To His Life, Statistics Show
49ers LB Chris Borland won't be last to retire early for safety reasons - Sports Illustrated
Former Wisconsin and NFL linebacker Chris Borland praises doctor for saving his life
SF's Borland quits over safety issues - ABC News
JJ Watt: I'm not one of those guys mad at the world because I'm getting my head hit. I play football. That's the way it goes. : r/nfl
Chris Borland Comments on Concussions, Retirement and More, News, Scores, Highlights, Stats, and Rumors
Chris Borland, 24, to retire from NFL, cites fear of concussions
League of Denial: The NFL's Concussion Crisis
Former NFL player Chris Borland on Tackle Can Wait PSA