Jay Alves, Colorado Rockies vice president of marketing, is seen with some baseballs in the club's humidor before the start of Game 3 of the National League Championship baseball series against the Arizona Diamondbacks in Denver, Sunday, Oct. 14, 2007. Homers and runs are way down since the humidor was introduced in 2002. The Rockies found baseballs were drying up and shrinking in Denver's thin air but the humidor keeps them regulation size throughout the season.