That's an incomplete view of their value. They can also be traded, in which case the player(s) traded for may themselves give value to the organization.
I'll go further and partially answer Aspen.
With the stack of middle infielders, it would not surprise me if Fitz-Gerald eventually is traded. I think the Gore deal probably yields 2-3 major leaguers. Ortiz may stick, Fitz-Gerald looks like he's figuring things out, and I won't pull the plug on Fien or Rosario. Cabrera was a decent roll of the dice - there were reasons to think he could outplay his scouting reports - and he looked good before he met his match in Wilmington.
As for the other deals, I don't think Cebert or Hartle will be great shakes, but I'd be surprised if neither gets a decent run in the majors. Also, don't sleep on Isaac Lyon, the throw in in the Ford deal. He's made it to AAA on a good season. I also am pretty confident in my loyalty to Harry Ford.
Dion looks like a nice return on Griffin, even if Hartle flames out. I don't have confidence in the other pieces. As fro the Garcia return, Cruz is a wild card, but I'm looking forward to seeing Grable and Cebert has a real shot at being useful.
As for Perales, I forget what I said at the time. I know there was a good chunk of remorse in Boston when the deal was done because some had thought Perales's stuff was top of the rotation before his injury. That said, I think that was a loss for Toboni.
