Some favor 2nd basemen. Some favor Babe Ruth. Is there any truth to these assertions? A Pitchers Park A ballpark will get tagged with this label when the confines are deemed to sway in the advantage of pitchers.
This means the offense has to work harder to score runs. The exception to this is Coors Field in Colorado, which has the third largest outfield yet because of its high altitude coughs up the 2nd most home runs in major league baseball. The denominator also includes strikeouts. To be sure, ballparks will have no impact on any of those outcomes. Therefore, we must remove them from the equation to isolate the effects different ballparks have on balls in play. I mentioned above how there would be additional letters for our acronyms.
These measures provide the run expectancy and the expected run expectancy, respectively, on those balls that are put into the field of play. Comparing the two allows us to see how each park influences balls in play. Notably, xwOBAcon does not factor in directionality i.
Therefore, it undervalues pulled fly balls that are more likely to reach shorter fences and overvalues pulled ground balls that are more likely to die in the shift. Likewise, xwOBAcon overvalues fly balls hit straightaway—which are less likely to become home runs because ballparks are deeper to center—and it undervalues ground balls hit up the middle that are more likely to find the outfield than their pulled counterparts.
The reason is that xwOBAcon will undervalue and overvalue various balls in play equally in every ballpark, thus failing equally to capture directionality everywhere.
I not only chose not to account for directionality, I also opted not to break these park factors down by direction. Indeed, a quick analysis of qualified starting pitchers revealed a meager 0. Park Factors For Pitchers. To recap, as applied to a ballpark, wOBAcon essentially provides the actual run expectancy created by all singles, doubles, triples, and home runs at the park, and xwOBAcon illustrates the expected run expectancy based on the launch angle and exit velocity of those hits.
Comparing the two entirely removes hitter and pitcher quality and just says, what was, as compared to what should have been, the result of the balls in play in this park, regardless of how many of those hits occurred in the park, who hit them, or who gave them up. A Comparison.
Sort the above table by the best place to hit according to my park factors, and then answer that question in your own mind. Initially, consider which parks you would have at the top. My answer would be no, but ESPN says yes. My answer would again be no, but ESPN says yes. Perhaps there are a few surprising outcomes in my park factors. Citi Field and Nationals Park are not traditionally considered hitting environments. Likewise, Fenway is often reasoned to be a bad place to stream a pitcher, though that may have more to do with the Boston lineup and, for Boston pitchers, the other lineups in that division, than anything else.
In my view, this is most evident at the extremes. Before considering individual pitchers, just take a moment to appreciate the effect Coors Field has on run expectancy. It is over three standard deviations from the mean. In other words, it has more than ten times the magnifying effect on offensive outcomes as Yankee Stadium, and more than double the effect of Minute Maid Park. Look at how small the foul ball territories are at the older ballparks such as Fenway Park and Wrigley Field.
Target Field is a new ballpark with a tiny foul zone. Oakland Coliseum , the home of the A's, has a large foul area. When stadiums have large foul areas, the games move quicker, less pitches are thrown and hitters get less at-bats because the defense has more of an area to make plays. A higher pitching mound allows a pitcher to put more downward velocity on the baseball. Teams that maintain pitching as their forte will often have higher mounds, for example, the Los Angeles Dodgers.
Dodger Stadium has the highest pitching mound in the MLB. This is a pitcher-friendly park that doesn't require the Giants offense to provide a ton of run support.
Center field is deep and the ballpark averages fewer than two home runs per game nearly every season. Center field is only feet away from home plate.
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