I only read the first few posts of this so if I am repeating I apologize, but the problem with platooning a pitcher in the home/away fashion is when he should be getting a road start and he is sitting, that will cause him problems. I would almost guarantee that his ERA at home goes way up because he is not getting his regular start every 5 days. Baseball players, especially pitchers are creatures of habit and when that habit is broken things can really go bad, or in this case evenworse.