Grimsby Town has admitted to breaching Carabao Cup rules by fielding an ineligible player, Clarke Oduor, in their second-round match against Manchester United. The club has been fined £20,000, with £10,000 to be paid upfront and the remaining £10,000 suspended until the end of the 2025/26 season. Grimsby's home support had taunted Manchester United's head coach, Ruben Amorim, with chants of 'You're getting sacked in the morning' throughout the clash. The match had ended in a thrilling 12-11 penalty shootout win for Grimsby, with Bryan Mbeumo and Harry Maguire scoring late goals for Manchester United. But it was Grimsby's victory that has been marred by the breach, which occurred when the club submitted Oduor's registration at 12:01 pm on the day before the fixture, missing the 12:00 pm deadline by a matter of seconds. Manchester United has decided not to appeal the result, despite some fans calling for the match to be replayed. Grimsby will be required to pay the suspended fine if they repeat the same mistake in any EFL competition between now and the end of the season. The EFL Board has determined that the breach was not deliberate and Grimsby had no intention of deceiving or misleading. The club's self-reporting of the breach has been taken into account, with the fine reflecting the circumstances of the case. Grimsby's manager will be hoping that the club can put this incident behind them and focus on their upcoming matches. The breach has raised questions about the club's administrative processes, but Grimsby will be looking to move forward and build on their Carabao Cup win. The suspended fine will serve as a reminder to the club to ensure that all administrative tasks are completed in a timely manner. Grimsby's fans will be hoping that the club can learn from this experience and avoid any similar incidents in the future.