Ask any true baseball fan today and they’ll know that Coors Field is a launching pad, or that it feels like its 10 times harder to hit a home run at Petco Park. Fans know this mostly by what we hear on television or by simply looking at the dimensions of the park. No matter what you believe, it’s hard to deny that certain Major League parks have a substantial effect on the amount of offense produced in games played there.
If it applies at the Major League level, you can be sure that it also applies at the minor league level. Not just certain stadiums, but also certain leagues have reputations as being more hitter friendly. If you notice that a certain player is putting up career power numbers the same year that he began playing in the California League, scouts will caution you about how easy it is to hit home runs there.
While Park Factors were originally designed to measure the effect certain Major League ballparks had on offense, they can just as easily by applied to minor league ballparks as well. When I say easily, I mean in theory not in practice. The calculations, if done correctly, modifying for a host of certain factors, are rather daunting and would take far too much time to explain. If you are interested in seeing how the following Minor League Park Factors were created, follow this link or visit baseball reference for an excellent description of how to calculate them. Their calculations will have a batter and a pitcher Park Factor, which are very similar. For the purposes of this article I have only included the batter Park Factor.
Below you will find the park factor for each minor league ballpark averaged out over three years. I have not included any level below the short season leagues so those of you looking for GCL or AZL park factors will have to look elsewhere or wait until I have more time. The results show you how much each ballpark increased offense compared to a neutral ballpark which is rated at 1, so a stadium with a 1.10 park factor means that the stadium increased offense by 10% (1.10-1 = .1 or 10%). If you need tips on how to interpret the numbers, just know that the higher number is, the more hitter-friendly the ballpark is and the lower the number is the more pitcher-friendly the park is. The list below is interactive, so feel free to sort by League, MLB team, highest/lowest etc.… Below that list is another graphic that will show you a more geographic representation of the data.