San Francisco 49ers on X: Want to relive Chris Borland's stellar rookie year with #49ers? Check out these rare images. / X
San Francisco 49ers Linebacker Chris Borland Retires From The NFL
Chris Borland, Fearing for Health, Retires From the 49ers. At 24. - The New York Times
49ers' defense leads 16-10 win against Giants with 5 INTs (w/video)
Chris Borland 49ers Football Jersey
NM-MT Condition-Note: minor surface wear towards upper right corner front side, See pics for Actual condition of card, comes with plastic sleeve/top
Chris Borland 2014 Panini Certified Football Rookie Gold Auto #111 SF 49ers /25
San Francisco 49ers linebacker Chris Borland retires over head injury concerns - ESPN
Overlooked offseason moves will have huge impact
Retiring 49er Chris Borland to pay back NFL signing bonus - Sports Illustrated