Right now, bookmakers seem to think the following lines are "correct":
Philadelphia +150 for Game 3
Philadelphia +600 to win NLDS
If these lines are in fact correct, it means we're looking at a 35.7% probability Philadelphia wins games 4 AND 5. That's not even in the ballpark, considering one of those games is in Coors and the other features a Francis-Kendrick pitching matchup.
Looking at this another way, let's say the Phillies swap their pitchers for Games 4 and 5, which shouldn't affect the probabilities that much. Game 5 then features the same starting pitchers and home team as Game 1. The market line for that game was Philadelphia -135, a 57.4% equivalent W%. In order for the 35.7% parlay percentage to be correct, Philly then needs to be a 62.2% favorite, or -164, in a game 4 matchup between Fogg and Kendrick. In Coors Field. Not bloody likely.
If you want to start a gambling hedge fund right now, your first investment should be in a combination of:
Phillies +150 for Game 3
Rockies -600 to win NLDS
You'll thank me later.