Denver Broncos head coach Vic Fangio walks the sideline during the first half against the Steelers in Pittsburgh on Sunday. (AP photo)

The league responded with hefty fines of $100,000 per coach and $250,000 per club. The first three to get fined were Denver’s Vic Fangio, San Francisco’s Kyle Shanahan and Seattle’s Pete Carroll, according to a person with knowledge of the punishment who spoke to The Associated Press on condition of anonymity because the coaches were not identified.

The punishment was meted out a week after the NFL reminded team personnel on the sidelines about the rules for wearing face coverings during the coronavirus pandemic, lest they put the fledgling season at risk.

More coaches and clubs can expect similar punishments as the memo last week from Troy Vincent, who oversees the league’s football operations, was largely ignored over the weekend.

Among other offenders: Patriots coach Bill Belichick and his offensive coordinator Josh McDaniels, Chiefs defensive coordinator Steve Spagnuolo, Colts coach Frank Reich and Rams coach Sean McVay.

San Francisco 49ers head coach Kyle Shanahan looks on against the New York Jets on Sunday in East Rutherford, N.J. (AP photo)

Capping a weekend of deliberate defiance and/or desultory disobedience, Raiders coach Jon Gruden, who said last week he felt Vincent’s memo was directed at him. On Monday night, Gruden wore his mask like a chin strap.

Following the Raiders’ 34-24 win over the Saints, Gruden revealed he’d had COVID-19 and apologized for violating the rules.

Players, who, like the coaches, are subject to daily COVID-19 tests, are exempt from the face covering requirements.