Jayne Kamin-Oncea-USA TODAY Sports
Following Week 1 of the 2020 NFL season, the league sent a memo reminding teams that coaches and staff members must wear face coverings on the sidelines.
Troy Vincent, the NFL's executive vice president of football operations, sent the memo on Monday morning to all head coaches, general managers and athletic trainers to address the NFL-NFLPA Game Day protocol.
"We must remain vigilant and disciplined in following the processes and protocols put in place by not only the league, union and clubs, but also by state and local governments," the memo said.