There’s much ado made about the environment at Coors Field. It enhances scoring and batting stats, they say, because the air is thin; therefore, the balls travels further. By that logic, it would also make for some terrible pitchers, since the environment works both ways. Even with the climate-controlled baseballs, the Park Factor is still 107 (where 100 is neutral and anything above favors hitters; Yankee Stadium is a 96).
So let’s look at some home/road splits for the Rockies. My hypothesis: we’ll see a depression of slugging percentage on the road, mainly due to the home run factor. However, we won’t see any correlating trend in batting average and on base percentage. The thin air should only have an effect on balls that leave the park. The results should all even out for those balls that stay in play. That is, if the ball does in fact carry in the thin air, a bloop may become an out, and a fly to center field may carry over the outfielder’s head.