Marion Barber announces retirement

Bears RB Marion Barber has decided to retire after 7 NFL seasons.  He was set to be released by Chicago after they added RB Michael Bush.  Barber is only 28 years old but ran with a reckless abandon and was never likely to have a long career.  His prime years came in 2006 and 2007, when he averaged 4.8 yards per carry and scored 28 total TDs.  But his production has nose-dived since.  Barber hit pay dirt only 26 times over the past 4 seasons, while averaging just 3.8 yards per carry.