Normally I would say that home/road splits don't matter and that you should pitch your best pitcher first, but Greinke is a special case. He has a history of anxiety and his numbers clearly reflect an advantage pitching at home. Greinke has a K/BB at home for his career of 4.13 compared to 2.95 on the road and his ERA is 3.47 at home and 4.26 on the road. With no clear #1 pitcher on this team, it makes sense to give Greinke home starts when possible. It helps that it will likely line up that he pitches at home anyway, for the first series at least (wood being knocked). On the surface Gallardo's numbers look better at home, but his peripherals suggest that he is not that much better at home than his ERA splits suggest. As long as Gallardo, Marcum and Greinke are the first 3 pitchers in the series, I don't really care how they line up, but it would seem to be beneficial to give Greinke the home starts if possible.