The incident took place in the third period of Wednesday's game. During an after-the-whistle scrum, the two became entangled, with Haula holding onto Wideman against the boards. Wideman then thrusted his head toward Haula, hitting him in the side of the face. Haula pulled Wideman down to the ice and delivered several punches before they were separated by officials.
Wideman was assessed a double-minor for roughing, while Haula received a minor penalty for roughing.
When skating to the penalty box after the incident, Haula's nose was visibly bloodied from a cut, though it is not clear if the headbut caused the laceration or another moment in the scrum.