Michael Frolik may soon be hearing from the league.

The NHL is looking at the Calgary Flames forward's hit on Arizona Coyotes defenseman Jakob Chychrun, reports NHL.com's Craig Morgan.

Frolik was assessed a tripping minor for upending Chychrun behind the Coyotes net late in the first period of Tuesday's game.

The Arizona blue-liner left the contest and was then ruled out for the remainder at the start of the second period.

Chychrun will have an MRI on Wednesday, according to Morgan.

Coyotes head coach Rick Tocchet wasn't pleased about Frolik's hit when asked about it postgame.

"I know he's not a dirty player, but it's a dirty play," he said. "I don't like it at all. I don't know how (Chychrun) is right now, we've got to evaluate him. It's not good. We're hoping for the best."