Casas got off to a slow start but I believe he would have come around. Toro and Gonzales have been great-but I doubt they can sustain this pace, not that I wouldn't love that.
No, you cannot have a player making decisions about where he will or will not play, no matter who he is. That is the tail wagging the dog. This would have leaked out anyway, regardless of whether or not Breslow went public-because it was the obvious move after Casas got hurt.
Its a TEAM sport. There's no "I" in TEAM.