Wochit News - Justin Smith, one of the most unheralded great NFL players since the turn of the century, has decided to retire. The San Francisco 49ers announced the news Monday, ending months of speculation about Smith's future.A five-time Pro Bowl player, Smith split his 14 seasons evenly between Cincinnati and San Francisco. He never got the credit he deserved as a member of the Bengals, possibly because his teams never won and Smith was known for doing the little things.