Complex sentence: Because there cannot be a tie in the playoffs, the teams would switch ends of the field and start multiple 15-minute overtime periods until one side scored, and all clock rules were as if a new game had started.
Split into simpler sentences: Because there cannot be a tie in the playoffs, the teams would switch ends of the field and start multiple 15-minute overtime periods until one side scored. Additionally, all clock rules were as if a new game had started.