Question: how many games do you have to win in the nlcs?
Answer: The NLCS and ALCS, since the expansion to seven games, are always played in a 2–3–2 format: games 1, 2, 6, and 7 are played in the stadium of the team that has home field advantage, and games 3, 4, and 5 are played in the stadium of the team that does not.