Sorry, but the underlying statistics don't lie, and that's why i'm using Masterson as en example, because he's having a similarly flukey performance and they will, most likely, both correct themselves. You can't maintain a sub-4 ERA with a scrap-heap K rate and massive platoon issues.
Hey, if you want to put on some blindfolds and thing that one and a half months of good (well, lucky) pitching is going to erase all of his prior (and future) mediocrity be my guest.