Rockies home/road splits are some of the most irrelevant, playing so much at altitude messes with your ability to recognize breaking pitches on the road where they move more. If the home park is not Coors but an extreme to one end or the other it can be a slight indicator, but generally it's noise. and also hasn't Wrigley played as an extreme pitchers park this season to this point? (Or at least it did last I checked, August may have changed things)