That is not what the randomness of baseball tells us. The Guardians, Yankees, and Red Sox are all good teams and are playing well as good teams often do. In September, the bad teams start playing differently and trying new players and may not focus on winning. And some teams just don't match up well with these good teams. Randomness has more to do with stuff that happens in individual games and short series. The best teams tend to have more winning streaks. That is not random.