49ers Chris Borland retires from football, citing concern over head injuries - Field Gulls
Chris Borland says he's returning most of signing bonus to 49ers
Chris Borland Shines, VP of Officiating Speaks out and Colin Kaepernick's Birthday
San Francisco 49ers' Chris Borland retiring from NFL
Chris Borland was special. #49ersfan #49ersempire #redandgold #49ersfaithful #49erscast #georgekittle #nfl #nflplayoffs #nflonfox…
Chris Borland Shines, VP of Officiating Speaks out and Colin Kaepernick's Birthday
Chris Borland, de 49ers, dice adiós a la NFL/ Rigoberto Plascencia
49ers ex-linebacker Chris Borland salutes Pat Tillman
Chris Borland retires from 49ers after one year due to fears over head trauma, NFL
Thanksgiving Football Is Tradition for Chris Borland