Kammala jumla mai zuwa: A ranar 19 ga Fabrairun 2018, an yi musayar Mrázek zuwa Philadelphia Flyers a musayar zagaye na huɗu na zagaye na huɗu a cikin
Zaɓin NHL na 2018 da zaɓin zagaye na uku na zagaye a cikin 2019. A ranar 22 ga Fabrairu, ya fara bugawa Flyers inda ya yi ceto 19 a nasarar 2 zuwa 1 a kan Columbus Blue Jackets.