Fines for refusal to wear a mask were part of NFL-NFLPA protocols in 2020, too. The difference this year is only unvaccinated players are required to wear masks inside the facility (among other restrictions) and thus subject to discipline for violations. From the 2021 protocols: pic.twitter.com/Xc5fe3KORv

— Tom Pelissero (@TomPelissero) August 26, 2021