Michael Bush would be a good addition but I don't look for BB to move on him until after the draft. If the Pats add a big RB, like Williams from BC, there may be less impetus to sign Bush. There does need to be some addition made ar RB this year since all three current players (Ridley, Vereen and Bolden) will, I believe, be on the last year of their rookie contracts and I don't the Pats will resign all three of them.