His LOB% last year was 65%. His LOB% this year is 55%. If you look at his situational stats, he's basically been very good without RISP and terrible with RISP. Either something happens inside him when he's in tougher situations that causes him to melt down or it's a small sample. Given that he's faced 70 batters with RISP this season, and his career numbers with RISP are actually better than his overall numbers, I'm going to chalk this one up to small sample size (which is luck if you ask me). Pitches always look worse when they get smashed into the gap for a double. I'm not trying to say your perception is wrong but that's a potential bias. Also, all pitchers throw pitches where they hit their spot and throw pitches where they miss their spot. I'd be interested to see some PitchFX data on the percentage of good and bad pitches that Zack throws as well as how often he throws good and bad pitches. Given his ridiculous strikeout rate and low walk rate, it's pretty easy to argue that the vast majority of his pitches are excellent. Maybe he just loses focus and throws up an occasional Ruben Quevedo-esque meatball that are much worse than the average pitcher's "bad" pitches. It's hard to know that for sure, but I don't really buy that as a likely scenario given that he's been in the league for a while without doing something similar ever before. He's also thrown over 800 innings since the whole Social Anxiety Disorder diagnosis.