Over the year or two many people have noted that the Statcast numbers in Comerica Park seem inflated compared to the real world results for the batted balls. From cursory research it appeared that this trend may be focused in right field, but perhaps not. Either way, you see Miguel Cabrera topping the xwOBA leaderboards on Baseball Savant, and xOBA leaderboards on xStats while his true results are lagging behind.
In one hand, that may appear to be a positive sign for a possible recovery, given his down season in 2017. In the other hand, it shouldn’t sit that well. His xwOBA is about 60 points higher than his real wOBA. The xStats fair a little better, and the difference is closer to 40 points. Either way, that is an absolutely enormous discrepancy.
There have been some hints that this effect may be focused in right field, which I noticed with Nick Castellanos. When I tell you something weird is going on in right field of Comerica Park, you might instinctively shed blame on that ludicrously deep right center field fence. I certainly did. That fence is about 430 feet deep and 11 feet high. It is one of the deepest areas in any MLB ballpark, rivaling AT&T Park.
But, I no longer believe that is the explanation. More on that in a moment, first I want to explain my methods. Read the rest of this entry »