 Opting to leave North Dakota after two seasons, Berezan turned professional and joined the Flames late in the 1984–85 NHL season.He appeared in nine games with Calgary and scored a point in each of his first four contests; Berezan's first NHL goal was scored March 20, 1985, against the Toronto Maple Leafs.Though an offensive player in junior and college, Berezan was converted to a defensive forward in the NHL.