We've all seen games in which an umpire's horrible strike zone played a huge part in the outcome. A bad ump can mean the difference between 0 runs given up and 5 or 6. I don't think that's an exaggeration, either. If a pitcher is "living on the black" but the ump isn't calling those strikes, and the pitcher is forced to chuck the ball down the middle....well, that means everything.
I'm just wondering if there have been any efforts to include that in analysis. It seems like a pretty significant wildcard. And I don't know if it all evens out in the end, either -- perhaps an ump doesn't see one particular guy's pitches well due to arm slot, etc.
Are there pitchers who just don't have good games when a particular ump is at home plate? If there isn't an analysis of this already, it would seem a worthy effort for those who are so inclined to research such things.