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While there are probably a few players that could drop a few pounds, this common New Year's resolution applies here more for losing the dead weight on the team's roster.
The Pittsburgh Steelers have a lot of players that just simply need to go. They've got to stop holding onto the old, poor, huddled masses.
Guys like Mike Wallace and Rashard Mendenhall are free to go anywhere they like, but the doors to Pittsburgh should be firmly shut and locked behind them. Neither player did anything to distinguish themselves in 2012, and their attitudes are seriously in question.
Likewise, their Father Time approach to backups must change. Charlie Batch and Byron Leftwich must be sent off into the sunset. Larry Foote, who was a starter by default this year and played well, could be a useful piece at the right price, but may also be simply ready to hit the wall.
Casey Hampton isn't a backup either, but Father Time is going to catch him. He wants to keep playing, but that can't happen on a defense that needs to get much younger.