The NFL has felt it necessary to expand and evolve on a weekly basis since the regular season began with regards to the Covid-19 protocols that it has put in place. Since the season began, more than two thirds of the league’s teams have had at least one player test positive. The Pittsburgh Steelers are actually one of the relative few that has not, though at least Jaylen Samuels and possibly others were previously positive, at the start of training camp.
Following the latest weekly scare, during which the league had two players on two different teams trigger positive tests from game-day samples after having played in said games, the protocols have evolved once again, and now the NFL strongly recommends that players wear masks at all times while on the sidelines.