Did Raiders break NFL rule by not disclosing Marcus Mariota injury?

Las Vegas Raiders head coach Jon Gruden said Tuesday that it was feared quarterback Marcus Mariota was one of multiple players who suffered a potential long-term injury in Monday's victory over the Baltimore Ravens, and The Athletic's Vic Tafur later added Mariota re-injured his quad, presumably on the play that saw him rush for 31 yards in the first quarter. 

As Pro Football Talk's Mike Florio explained, however, the Raiders never officially announced Mariota was injured, which would be a violation of NFL rules for reporting such setbacks assuming the signal-caller was hurt. 

NFL spokesman Brian McCarthy said to PFT via an email:

"Club personnel are responsible for reporting in-game injury information factually and accurately as soon as possible for the benefit of the network television audience and the other media covering our games. To ensure fans in the stadium have access to the same information, these injury updates must also be posted on the stadium video boards, scoreboards or ribbon boards. The in-game injury updates must be disseminated simultaneously to all parties — the network television broadcaster, the media in the press box and the fans in the stadium. . . . In-game injury announcements to the media must be specific to a body part, accurate, and updated as warranted, including any changes to the player’s status for the remainder of the game if his status changes after the initial report." 

The NFL has a history of strictly enforcing these guidelines meant to prevent individuals who gamble on games from potentially having inside information if even for a brief period. Earlier this summer, the Tampa Bay Buccaneers were in headlines after it was learned quarterback Tom Brady played throughout the 2020 season with a fully torn medial collateral ligament in his left knee that was never mentioned on any injury report. 

Both the Raiders and Buccaneers could eventually face fines for these alleged violations.