Back to Castro, it we're going by WAR, according to BBR, his oWAR is 4.6, with a dWAR of -2.6, which yes, at this point in time bumps him down to a 2.0 WAR. However, his defense is likely to improve, and if he can't handle SS, he can be moved. Meanwhille, his offense is also likely to improve, ideally both his power and patience, so in the end, it's very possible that he could end up a 6-7 WAR player or better, so in conclusion, I would think that locking up him up should be a priority. No necessarily this offseason, but in the not too distant future.