As you all know, the Celtics negotiated with free agent forward Rasheed Wallace, who has verbally agreed to join the C's, and looks to sign a two-year deal for the full mid-level exception on Wednesday. The addition of Sheed will impact the team in a way I can't yet figure out. His off-court attitude will certainly be a problem, especially if he's going to be with us for two years (unless trades or injuries change that). But it's been said that teammates love him and guys thin...