Justin Masterson uses two fastballs and a slider to get his work done. That seems like a fine plan, except that all of those pitches, when looked at across baseball, are better against righties than lefties. So it’s no surprise that Masterson has had problems against lefties over his career. So now that he’s still throwing the same pitches and yet having better results, should we believe it? Hint: I don’t think so.
[Me, on RotoHardball]