Borland retires at 24, citing health concerns
49ers star Borland, 24, retires over health concerns
San Francisco 49ers: Who Will Replace Patrick Willis and Chris
Potential draft replacements for Chris Borland, Patrick Willis
Wary of head trauma, 49ers' Chris Borland retiring at 24
DLF IDP Mock Draft Review - Dynasty League Football
The 2013 San Francisco 49ers re-draft - Niners Nation
Patrick Willis' retirement a jarring one for 49ers – Times Herald
Patrick Willis and Chris Borland Should Be Praised for Stepping
49ers LB Chris Borland is retiring after one season rather than
49ers draft picks tape study: Chris Borland - Niners Nation
49ers hit hard after unexpected offseason departures - The Boston
Chris Borland stuns 49ers with retirement announcement
Is there a 49ers Retirement Conspiracy? - Fangirl Sports Network