Complex sentence: The game is not played if both teams are guaranteed to go to the playoffs without the game, which is possible if the team that loses the game in a tie-breaker for the division would still go to the playoffs as a wildcard.
Split into simpler sentences: The game is not played if both teams are guaranteed to go to the playoffs. For example, the team that loses the tie-breaker game for the division would still go to the playoffs as a wildcard.