Fans still ask ex-49er why he quit; he keeps telling his story
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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49ers' Borland retires after rookie year over head trauma fears – Santa Cruz Sentinel
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/cdn.vox-cdn.com/uploads/chorus_image/image/45912174/usa-today-8273980.0.jpg "49ers linebacker Chris Borland retiring at 24 due to long-term health concerns - SBNation.com")
49ers linebacker Chris Borland retiring at 24 due to long-term health concerns - SBNation.com
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Chris Borland Shines, VP of Officiating Speaks out and Colin Kaepernick's Birthday
What It Means to Leave Football Early - WSJ
: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
: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
49ers' Chris Borland returning most of signing bonus
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The file on Chris Borland - NBC Sports RSN
Chris Borland slams Wisconsin football program in Netflix doc
Overlooked offseason moves will have huge impact | USA TODAY Sports Wire
University of Wisconsin football players downplay warnings while proof of brain injury — even from small hits — piles up - WisconsinWatch.org
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