Sean Avery, one of the biggest hockey personalities, took to Twitter to enrage fans worldwide.

As everyone knows, COVID-19 has continued to polarise fans, players, and officials worldwide. Some believe vaccinations should be mandatory, while others disagree. Now the NHL is in the mix.

The NHL is reportedly requiring employees in New York City to show proof of COVID-19 vaccination by September 13th or face unpaid leave.

I've been told @nhl has asked employees in the NYC office to show proof of Covid vaccination by September 13th or be placed on unpaid leave.� Sean Avery (@imseanavery) August 9, 2021

This is a huge sign for the NHL as well. Other sports leagues, such as the National Football League, require their players to get the vaccine or face sanctions. No word on requiring the vaccine for NHL players, but it wouldn't be surprising.