[1] He committed to a collegiate career with the University of Minnesota in the Big Ten Conference (B1G).

After completing his college career, he signed a two-year entry-level contract with the Sabres in May 2023 and was assigned to AHL affiliate, the Rochester Americans as that team was playing in the AHL Eastern Conference finals.

[2] In the 2023–24 season, Johnson made his NHL debut against the Toronto Maple Leafs on November 4, 2023 after being recalled from the Rochester Americans of the AHL.

[3] Johnson's father is former NHL forward Craig Johnson who was a draft pick of the St. Louis Blues in the 1990 NHL entry draft and played 557 games in the NHL for the St. Louis Blues, Los Angeles Kings, Toronto Maple Leafs, Washington Capitals and the Mighty Ducks of Anaheim.

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