Firkus was drafted by the Kraken in the 2022 NHL Entry Draft, second round, 35th overall. The 20-year-old right winger who stands at 511 and 161 pounds has been with the Moose Jaw warriors since 2020.
In the 2023-2024 season was by far his best season in his hockey life as he played 63 games, scoring 61 goals and 65 assists for 126 points and was a + 31 with 30 penalty minutes. He also was dominant in the playoffs as he played twenty games and scoring 14 goals with 18 assists for 32 points and was a + 9.