I'm not sure who benefits more or less from a rain out. It's certainly logical that moving Grienke/Verlander/Cole all up a game in the series is advantageous, but making a game 7* a kitchen sink/bullpen game would be way too stressful. Of course eliminating a day off between four games should be a disadvantage for the Yankees bullpen, but that cuts both ways and increases the workload on Harris/Osuna/Pressley/Smith.