A transgender man suffered a concussion during a National Hockey League-sponsored All-Trans Draft Tournament in Wisconsin, according to a writer there, as video showed a transgender woman may have made contact with the player, sending him into the boards.

The injury came after the NHL posted a tweet last month in support of transgender people following its announcement to support the Team Trans Draft Tournament in Middleton, Wisconsin, which was the first tournament featuring only "transgender and nonbinary players."

"Trans women are women. Trans men are men. Nonbinary identity is real," the league wrote in a Nov. 22 Twitter thread. The tournament took place just days before the post.

The NHL, however, did not share the outcome of the tournament and media outlets such as Vice that sent crews to cover the contest also failed to report on the outcome, reporter Jonathan Kay wrote for Quillette.

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A biological woman suffered a concussion after being pushed to the ground by a biological man during a National Hockey League-sponsored All-Trans Draft Tournament in Wisconsin. (AP)

According to Kay, the lack of coverage regarding how the tournament played out was due to the clear physical advantage the biological men had over the biological women.

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The injury comes after the NHL posted a tweet last month in support of transgender people following its announcement to support the Team Trans Draft Tournament in Middleton, Wisconsin. (A2012)

At one point during the event, according to Kay, a biological male who identifies as a woman pushed the other player, a biological female who identifies as a man, sending the athlete head-first into the boards.

"The contact doesn’t look particularly serious when you watch it on video. It may even have been entirely accidental," Kay wrote, but added there was a major "size imbalance" between the two players. 

"Get a stretcher! Get a medic!" players shouted as they surrounded the injured. 

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The event was the first tournament featuring only "transgender and nonbinary players." (Getty)

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The player, who suffered a concussion, was not taken off the ice on a stretcher for more than 17 minutes, Kay wrote.

EDITOR'S NOTE: This report has been updated to clarify the details of the incident at the game.