Get him his 20 games in AAA and then bring him up. He's a player.
I love WAY fast guys with high contact #'s. He's got decent power, to boot. Pair him as your COF's with Hampton and you're good to go for a while.
I would think he's an .800+ OPS guy right now, without any growth. And 56 health isn't THAT low.
Baez has one year left on his contract, DH/PH/4th OF him next year.