Just read this article about the infield grass being longer, but a possible shut down of the humidor at Coors? I thought they had to go by MLB rules, but you never know.
Humidor still an unknown, but infield grass at Coors will get even longer... In February, even a tidbit about baseball's most volatile ballpark passes for news. Coors Field's groundskeeper told the media this week that the Rockies have left their infield grass long, starting in 2005 and running through 2006, and that they plan to keep the grass even longer this season.
Aaron Cook (RHP, COL), in particular, and to a lesser extent Jeff Francis (LHP, COL), stand to benefit disproportionately from any ground ball-friendly features of Coors. Cook consistently has a ground ball rate around 60%, and Francis saw his ground ball rate climb from 40% to 45% last season.
An extra bit of grass is likely insignificant if the (in)famous Coors humidor is throttled down this season (it won't be shut down, assumedly, as MLB has issued a directive ordering all balls to be stored at the same temperature after being delivered to teams; the humidor is probably the simplest means for Colorado to comply). Coors returned to the days of the Blake Street Bombers late last season, with 235 runs scored in 14 September games, after playing as a moderate pitcher's park for the prior five months. Some speculated that the Rockies might have shut down the humidor as an experiment. Whether the humidor will be in full effect is anyone's guess. If it is used anything like it has in recent seasons, then the extra grass length may show up in the performance of Cook, Francis and the rest of the Colorado staff.