The NFL sent out a memo to teams on Tuesday morning, causing San Francisco 49ers tight end George Kittle to crash Fred Warner’s interview on NFL Network to “air a grievance.”

The memo prohibits teams from giving players any form of ammonia, including ammonia capsules, inhalers, ammonia in a cup, or any form of smelling salts. And that isn’t just during game time. Clubs are not permitted to supply ammonia during pregame activities, halftime, in the locker room, or on the sideline at any point.

As Warner was being interviewed, Kittle approached the set on NFL Network, saying, “I honestly just came up here to air a grievance. Our team got a memo today that smelling salts and ammonia packets were made illegal in the NFL, and I’ve been distraught all day.”

The league’s hands were tied after

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