bell has been banned after being found in possession of a 20 gram bag of marijuana and was hit with a dui charge last august .
a key piece of the steelers offense , his absence during the play-off game with the ravens was a key factor in the steelers defeat .
and they will have to start the season without the 23-year-old running back .
legarrette blount was in the vehicle with bell and he was banned for the first game of the season earlier this week .