Here's a look at the play:
Panthers bench boss Bob Boughner expressed his displeasure with the collision following his club's shootout win.
"It's high. It's a head shot," he told the Washington Post's Isabelle Khurshudyan. "And the league's trying to clamp down on that. Whether there's no call, I don't blame the refs. Maybe they missed it. That happens. But those are the kind of plays that need to be reviewed."
Boughner added that Pysyk was still being evaluated after sustaining an upper-body injury, but expects to know more in the morning, according to NHL.com's Tom Gulitti.