Pettersson (upper body) will be available versus the Blackhawks on Saturday, Brendan Batchelor of Sportsnet 650 reports.
Pettersson will avoid missing any time after taking a blow to the head against the Flames on Wednesday. Even with the youngster cleared to play, he could serve as a healthy scratch against Chicago, or beyond, if Tyler Myers (undisclosed) is also given the all-clear.