Kassian played seven seasons for the Edmonton Oilers between 2015 and 2022. He became a fan favourite for his physical play with hits and body checks, but was also able to pot a few goals with two 15 goal seasons. He was most memorable during the 2017 playoff run when he was a menace on the ice, delivering thunderous hit after thunderous hit. Fans loved him for his attitude on the ice, but also for the fact that he embraced the city of Edmonton completely.