from Nicholas J. Cotsonika of Yahoo,

The NHL put GoPro cameras on the front of officials’ helmets to record that perspective twice last preseason (both in Toronto) and twice this preseason (in Buffalo and Detroit). It wasn’t for promotional purposes. It was for internal training.

The officials don’t like wearing the cameras – mounted with adhesive, blacked out with gaffer tape. But the cutting-edge footage is for education and improvement.

“You never really know what you’re going to get from it,” said Tom Masters, video manager, NHL officiating. “But hopefully there’s some teachable moments in there you can use going forward.”

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