The NHL's Department of Player Safety called the play by Hyman a "late, forceful, high hit" that came well after McAvoy had played the puck.
The league also called it a "predatory hit," but cited Hyman's lack of previous fines or suspensions for the decision to suspend him only two games.
Hyman, in his third full NHL season, was given a five-minute major for interference and a game misconduct on the play.
McAvoy was playing in just his second game back after missing 20 games with a concussion. He left Saturday's contest after the hit but returned to the bench late in the game and was active Sunday at Ottawa.