The Ottawa Senators’ helmetless warmup in Sin City has ruffled feathers at the National Hockey League’s headquarters in New York.

The Senators started a trend last Wednesday by not wearing helmets during the warmup before their 4-3 shootout victory over the Vegas Golden Knights at T-Mobile Arena.

The Senators had lost six straight games in Vegas and needed to change their luck, so the decision was made to go bucketless during warmups in Vegas.

“It was just a little discussion over a team dinner last night,” defenceman Jake Sanderson told TSN’s Kenzie Lalonde after the second period of the game in Vegas. “We’ll see if it happens in the future.”

But since then, the San Jose Sharks have followed suit, collectively not wearing helmets during warmups on Saturday in Vegas.

On Tuesday night,

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