Mathew Barzal pays a big price for losing his cool. Brad Penner-USA TODAY Sports

Mat Barzal committed a pathetic act as he lost his sense of sportsmanship during his team’s blowout loss on Monday.

The New York Islanders got smashed 8-0 in Game 5 of their Stanley Cup semifinal series with the Tampa Bay Lightning. Late in the game, Barzal got ejected for crosschecking Jan Rutta with a dirty play.

That was the capper on a terrible night for the Isles. They fell behind 3-0 after the first period, 6-0 after two periods, and lost 8-0.

Tampa Bay now leads the series 3-2. Game 6 will be on Wednesday.

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