Well to put it simply, they will run out of luck.
They have had no injuries, have caught every break imaginable and are having career years from a bunch of people who will never approach these types of numbers again.
Yet they are only a game or two ahead of the class of the central, the Cardinals. Outside of the Red Sox, they have had the most amount of injuries which include almost half of their starting rotation. They are having down years by every player in their lineup outside of Rasmus.
Reds luck will run out and the Cardinals Big 3 pitchers will start it. This team reminds me alot of the Brewers team from 2008