Answer
In this sentence, "or" is being used in the inclusive sense.
Work Step by Step
Inclusive "or" means that a team wins the playoffs if it wins two games in a row OR wins a total of three games OR both. Exclusive "or" means that a team wins the playoffs if it wins two games in a row OR wins a total of three games, BUT it loses the playoffs if it does both. Context makes clear that the former is the case, not the latter.
