The idea of using a humidor at Chase Field, as they do at the Rockies’ home park in Denver, is to make the park less of a hitter’s venue. This works, because the humidor - as its name suggests - keeps the balls used in the game in an environment of relatively high humidity, compared to the “outside” one. This has two effects. Firstly, it makes the balls less “bouncy” - or in more scientific terms, lowers their coefficient of restitution. This increased squishiness means that they don’t fly off the bat as fast, and consequently, as far.
Arizona Diamondbacks to build humidor at Chase Field
