Justin Smith retires: 49ers defensive lineman announces retirement
Justin Smith Announces Retirement from NFL
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San Francisco 49ers defensive end Justin Smith to retire from
49ers DL Justin Smith retires after 14 seasons
49ers' Justin Smith announces retirement
49ers' Justin Smith calls it quits after stellar 14-year career
San Francisco 49ers DL Justin Smith retires after 14 NFL seasons
Niners defensive tackle Justin Smith retires