University of Wisconsin football players downplay warnings while proof of brain injury — even from small hits — piles up - WisconsinWatch.org
Fans still ask ex-49er why he quit; he keeps telling his story
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Anthony Davis becomes 4th member of 49ers to retire this offseason - ABC13 Houston
Newsela - NFL rookie retires to avoid the risk of head injury
San Francisco 49ers Chris Borland retires over repeated head trauma | Daily Mail Online
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:format(jpeg)/cdn.vox-cdn.com/uploads/chorus_image/image/45912212/459129724.0.jpg "49ers' Chris Borland becomes latest young NFL star to retire early - Cincy Jungle")
49ers' Chris Borland becomes latest young NFL star to retire early - Cincy Jungle
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49ers ex-linebacker Chris Borland salutes Pat Tillman
49ers' Chris Borland retiring at 24, wary of head trauma | Nation & World | meridianstar.com
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Fans still ask ex-49er why he quit; he keeps telling his story
:format(png)/cdn.vox-cdn.com/uploads/chorus_image/image/46817000/sbnation-share__47_.0.0.png "50 days until 49ers kickoff: Who wore it best? Who wears it now? - Niners Nation")
50 days until 49ers kickoff: Who wore it best? Who wears it now? - Niners Nation
Chris Borland Retires: Six Things to Know About 49er Who's Walking Away
Rookie Watch: Chris Borland tops late-round steals list
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Fans still ask ex-49er why he quit; he keeps telling his story
The file on Chris Borland - NBC Sports RSN
Chris Borland, Fearing for Health, Retires From the 49ers. At 24. - The New York Times
San Francisco 49ers Chris Borland retires over repeated head trauma | Daily Mail Online
Chris Borland, 24, Retires From NFL After Rookie Year | Time
Overlooked offseason moves will have huge impact | USA TODAY Sports Wire
49ers' Borland retires after rookie year over head trauma fears – Santa Cruz Sentinel
