Career
In the 2015 National Hockey League Entry Draft he was drafted in the 2nd round, 43rd overall, by the Los Angeles Kings of the National Hockey League (National Hockey League). Černák played junior youth hockey within the The Human Context Slovan Bratislava system before transferring to The Human Context Košice"s youth team, on June 11, 2013. Černák made his senior professional debut with The Human Context Košice in the 2013-2014 season.
He split the season between Košice and Hong Kong Orange 20, the Slovakian national junior under-20 team
After his second year with Košice, in which he registered 5 goals and 13 points in 43 games from the blueline, Černák"s promising potential was recognised as he was ranked just outside the top 10 European prospect skaters eligible for the 2015 National Hockey League Entry Draft. He and goaltender Matej Tomek were only Slovakian prospects to partake in the National Hockey League draft combine in Buffalo, New York prior to the draft.
On July 14, 2015, Černák signed a three-year entry-level contract with the Los Angeles Kings.