Danielson made his WHL debut for the Brandon Wheat Kings during the 2020–21 season and recorded three goals and 12 assists in 24 games.
[3] On January 10, 2024, Danielson was traded to the Portland Winterhawks in exchange for Nick Johnson, Rhett Ravndahl, and three draft picks.
[6][7] He made his preseason debut for the Red Wings on September 26, 2023, and scored a goal in a 4–3 victory over the Pittsburgh Penguins.
He became the sixth player to make his Griffins debut during the playoffs a year after being drafted, following Jason Spezza (2001), Cory Emmerton (2006), Jan Muršak (2006), Dylan Larkin (2014), and Evgeny Svechnikov (2015).
[11] Danielson represented Canada at the 2020 Winter Youth Olympics where he recorded two goals and one assist in four games and won a bronze medal.