Saad's final shift of the game ended with 8:35 left in the second period. He had zero shots on goal and a zero rating, and had 11 shifts and 6:21 of ice time in the game.
"He seemed all right here," Blackhawks coach Joel Quenneville said after the game. "I don't think it's too serious, but we'll have a better idea [Monday]."
Saad leads the Blackhawks with a plus-29 rating and is sixth on the team with 44 points. He has 19 goals and 25 assists in 68 games this season.