This was from an SI article I found. I haven't found anything yet on if he loses a game check.
“The primary responsibility for enforcement of the COVID protocols within club facilities rests with each club.” Failure to enforce those protocols comes at a cost. Last season, for instance, the New Orleans Saints were fined $500,000 and forfeited a seventh-round draft pick for COVID violations. The Saints and Las Vegas Raiders were fined $250,000, and coaches Sean Payton and Jon Gruden were fined $100,000 apiece, for not properly wearing face coverings on the sideline during their Week 2 game.