Blackhawks' Patrick Kane out 3 weeks with lower-body injury
Kane suffered the injury in the second period of the Blackhawks 4-0 victory, when Blues left winger Brenden Morrow landed on Kane's left leg.
Kane fell to the ground, got up slowly and skated to the locker room to an examination.
"It was a freak play and can happen," Quenneville said, via NHL.com. "We've been fortunate most of the year [to not have injuries], so we'll deal with it."