He made his professional debut with Kristianstads IK in the HockeyAllsvenskan (Allsv) during the 2020–21 season while on loan from Rögle BK.
He made his Swedish Hockey League (SHL) debut, appearing in relief in one game during the campaign.
Clang’s NHL rights were held by the Penguins until 21 March 2022, when Clang, along with forwards Zach Aston-Reese and Dominik Simon, and a second-round pick in the 2022 NHL Entry Draft, was traded by Pittsburgh to the Anaheim Ducks in exchange for forward Rickard Rakell at the trade deadline.
During the 2023–24 season, on 8 December 2023, Clang was recalled by Anaheim while goaltender John Gibson was placed on the non-roster list.
[4] Clang did not feature with the Ducks during his recall before he was returned to the San Diego Gulls for the remainder of the season.