Yes it's possible for a player to make less through arbitration, but it can't be more than a certain percentage of a paycut(the number fails me now). Most of the time a player that would get that much of a paycut will be non-tendered to try and renegotiate at any price, since he's not that valuable to begin with. Patterson is an unusual case. He's put up acceptable production for his position in the past, but he was terrible this year. I wouldn't be surprised if he made less, the same, or more. I don't think you could expect Zambrano's salary to double, but my guess is that he gets a raise to the 5-6 million range. From what I have, Hairston is a free agent. Almost positive he can't get a paycut of less than 20% through arbitration, although it could be 25%.