Sweeney is a much better hitter when healthy...I still don't trust Kraiggers to be anything more than a mini-Troy Glaus (cruddy AVG but plenty of HR's). I'd personally take the chance on Sweeney even though he has no protection.
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Probably not much, but at least he has te potential to contribute strongly, especially if he can stay healthy and gets trades. In Wilson's case, it is highly debatable if he will give you very much more than any schmoe off the waiver wire.