San Francisco 49ers running back Jordan Mason filled in for the injured Christian McCaffrey during a surprise victory against the New York Jets, rushing for 147 yards and a touchdown. After the game, Mason revealed he learned he would start on Friday, contradicting the team's questionable designation for McCaffrey, which raised concerns about potential violations of NFL injury reporting rules. This discrepancy has sparked outrage among fans and fantasy football players who were unprepared for McCaffrey's sudden absence. Mason expressed frustration with the media for his comments, indicating he was unaware of the implications of his revelation. The situation has prompted speculation that the 49ers may face fines for not being transparent about McCaffrey's injury status. As the NFL investigates, it highlights the broader issues of injury reporting and its impact on betting and fantasy sports.