Kammala jumla mai zuwa: Bayan halartar sansanin horar da Kings na 2016, an sake tura Černák zuwa reshen kungiyar Hockey ta Amurka (AHL), Ontario Reign, sansanin horo. Duk da rawar da ya taka a matakin AHL, an dawo da shi zuwa ƙarami don yin wasa a karo na biyu tare da Erie Otters na Ontario Hockey League (OHL) don kakar 2016<unk>17. A ranar 26 ga Fabrairun 2017, Sarakuna sun yi musayar Černák (tare da Peter Budaj da wani
Zaɓin zagaye na bakwai na 2017) zuwa Tampa Bay Lightning a musayar mai tsaron gida Ben Bishop da zagaye na biyar na 2017.