Good trade?

Why trade for someone you will drop? I wouldn't do this. Perez puts up huge K numbers, is playing on a very good team so he will get wins, and has shown the potential in the past to put up a good ERA. Also, McCann is a top 3 catcher. The dropoff after him, Martinez and Posada is huge. King Felix is nice, but still somewhat an unknown. Andruw looks he'll hit .220 for the rest of his career with that swing.