I never said Greinke was not really good. His ERA on the road is just under 2. That is really, really good. No doubt. It's still not as good as Arrieta's in similar circumstances, he doesn't win as much as Arrieta, isn't in the top of all major pitching categories like Arrieta (wins, ERA, BAA, CCG, strikeouts, shutouts, WHIP, etc.). Arrieta is the league leader in wins and 2nd in ERA. And Arrieta has been lights out lately while Greinke has been pitching in pitcher friendly Dodger Stadium.