If it were a guarantee that pitching at home would guarantee a brewer victory, pitching him in game 6 would be the obvious choice. The fact is, Greinke pitching at home is FAR from a guaranteed victory so waiting to pitch him in game 6 does not make sense. Pitching Greinke in game 5 gives the brewers the best odds to win the series and set us up for the next series if we are lucky enough to get there. That said, Ron has not always gone with the option that gives the team the best chance to win (starting a right fielder in center field), so who knows what he will do.