I like Griffey and think he will come back very good( at least I hope since he's on a couple of my teams). If you have space to stash him I definitely say keep him. Young's ok, but if you already have a 2B, he's probably not worth keeping.
I think Ortiz will have a good year. It would depend on if you need the pitching. If you need it, go for it I'd say. Cabrera might have a good year also, but it depends on what you need more of.