MONTREAL (AP) -- Montreal Canadiens tough guy George Parros has sustained a fighting-related concussion for the second time this season.

Parros was stunned by a pair of late punches in a fight with Eric Boulton in Montreal's 1-0 overtime road win over the New York Islanders on Saturday. Parros was wobbly getting to his feet, but skated off the ice.

He didn't return to Saturday's game and was a scratch for Montreal's 2-1 home loss to Florida on Sunday. Canadiens coach Michel Therrien confirmed after the game that Parros suffered a concussion and will be evaluated this week.

Parros missed the first month of the season after being injured in a fight with Toronto's Colton Orr in the opener.

Parros was knocked unconscious after a tussle with Orr brought him tumbling to the ice.

The great debate: 50 landmark hockey fights

Copyright 2014 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.

SI Apps
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide - from Peter King, Tom Verducci, Lee Jenkins, Seth Davis, and more - delivered straight to you, along with up-to-the-minute news and live scores.