[2] He then had a brief stint with the Guelph Jr. Hurricanes of the Greater Ontario Junior Hockey League (GOJHL) in 2018, only playing two games.

[8] Morrison was also named playoff's most valuable player (MVP), winning the Wayne Gretzky 99 Award, as he had scored 19 goals and managed 39 points through 19 games.

[8] On April 12, 2023, Morrison signed a three-year, entry-level contract with the Seattle Kraken, set to begin in the 2023–24 season.

[11] Before the start of the 2023–24 season, Morrison was sent down to the Kraken's American Hockey League (AHL) affiliate, the Coachella Valley Firebirds.

[13] He made his NHL debut with the Kraken on March 26 against the Anaheim Ducks in a 4–0 win, when he played on the same line as Winterton and Tye Kartye.