This is Clarkson's second suspension of the season. He got an automatic, 10-game suspension for leaving the bench to enter an altercation during the pre-season.
That history played into the department of player safety's decision to give Clarkson two games, as did the fact that Sobotka was not injured as a result of the play.
Clarkson will miss Toronto's game Saturday against the Blackhawks and Monday at the Penguins.
As a repeat offender, Clarkson will forfeit roughly US$128,000 in salary as a result of the suspension.