A team has to win 7 playoff games in order to advance to the World Series. The Divisional Series (ALDS or NLDS) is the best of 5 and the Championship Series (ALCS or NLCS) is the best of seven.
In the modern era of baseball, the MLB World Series is a "best-of-seven". In other words, the first team to win four games wins the World Series. So how many games is the World Series? Either 4, 5,...