Severino pitches to the configuration of Yankee Stadium when he is pitching in Yankee Stadium. Something our pitchers tend not to do...certainly not our LH starters. Price doesn't. Erod certainly didn't his last time out there. Erod/Vaz in Yankee Stadium was IMO the worst battery performance I have seen in a long time.
Sale of late is throwing a backdoor Slider to RH hitters more than he is throwing a back foot Slider to them. I am not real thrilled with that either. But Sale will be a Game 5 pitcher in Fenway.
How will Evo do there? I am not sure how that Cutter he is depending on lately will play in that park against their RH hitters. If he gets that pitch up at all it likely won't be pretty. Even between thigh and knee, it could be a problem. He really needs to keep his Slider at the knees or below.
Outside of a healthy Sale, Porcello has the best chance of succeeding in that park.