
Chris Borland #50 of the San Francisco 49ers stands on the sideline prior to the game against the Oakland Raiders at O.co Coliseum on December 7, 2014 in Oakland, California. The Raiders defeated the 49ers 24-13. (Photo by Michael Zagaris/San Francisco 49ers/Getty Images)
Chris Borland of the San Francisco 49ers stands on the sideline prior to the game against the Oakland Raiders at O.co Coliseum on December 7, 2014 in Oakland, California. Borland said Monday he was retiring from the NFL after only one season. (Photo by Michael Zagaris/San Francisco 49ers/Getty Images)






