49ers lineman Justin Smith announces retirement after 14 seasons
Justin Smith – Missouri Sports Hall of Fame
Patrick Willis, ex-teammates praise Joe Staley upon 49ers retirement – Daily Democrat
Justin Smith To Retire - CBS Sacramento
Justin Smith (defensive end) - Wikipedia
49ers defensive lineman Justin Smith retires after 14 seasons
Justin Smith – Missouri Sports Hall of Fame
49ers Defensive Star, Team Leader Justin Smith Retires From NFL - CBS San Francisco
49ers' Justin Smith announces retirement