Anthony Davis becomes 4th member of 49ers to retire this offseason - ABC7 Los Angeles
2002 Game-By-Game Team Statistics - Hofstra University
San Francisco 49ers star Justin Smith retires from the NFL, NFL News
San Francisco 49ers Chris Borland retires over repeated head trauma
San Francisco 49ers: Predicting Hall of Fame Chances for Patrick Willis, News, Scores, Highlights, Stats, and Rumors
Is fear of injury pushing NFL players like Borland out?
San Francisco 49ers roster tracker 2015: Free agency, NFL Draft, trades and more - Niners Nation
49ers' Patrick Willis retires 'happy' – The Mercury News
49ers fire DC Eric Mangini, hire Lions RB coach Curtis Modkins as OC - ABC7 Chicago
2017 LSU Football Media Guide by LSU Athletics - Issuu
49ers' Justin Smith joins retirement stampede – Santa Cruz Sentinel
49ers defensive end Justin Smith announces his retirement - Los Angeles Times
DDC-12-5-2015 by Shaw Media - Issuu