Justin Smith retires from NFL
Justin Smith retirement closes out Bengals greatest draft class
Justin Smith retires: 49ers defensive lineman announces retirement - Sports Illustrated
So long, Cowboy? Justin Smith will reportedly retire
49ers Nick Bosa praised by all-time great Justin Smith
49ers' Justin Smith retires after 14 NFL seasons
10 Key Moments in Justin Smith's Football Career
Justin Smith – Missouri Sports Hall of Fame
So long, Cowboy? Justin Smith will reportedly retire
Justin Smith – Missouri Sports Hall of Fame
Justin Smith (defensive end) - Wikipedia
Justin Smith – Missouri Sports Hall of Fame
Niners defensive tackle Justin Smith retires
10 Key Moments in Justin Smith's Football Career