Selected by the Kitchener Rangers of the Ontario Hockey League, 34th overall, in the 2017 CHL Import Draft, Liška opted to continue his development in North America during the 2017–18 season.

[citation needed] After posting 31 points in 62 games with the Rangers, Liška went undrafted in the 2018 NHL Entry Draft and opted to return to Slovakia with Slovan Bratislava.

Liška made his KHL debut in the 2018–19 season, appearing in 52 games as a rookie to contribute with 4 goals and 10 points.

[citation needed] With Bratislava's return to the Slovak Extraliga, Liška decided to continue in the KHL, signing a one-year contract with Russian club, Severstal Cherepovets on 1 July 2019.

[1] On 9 February 2019, Liška made his senior national team debut in Slovakia Cup[2] match against Russia B.