The registration deadline was 12pm the day before the game, but Grimsby submitted Oduor's registration just one minute late. They had a computer problem that caused the delay, and they didn't notice the issue until later. The club took responsibility for the mistake and reported it to the governing body as soon as they found out.

Grimsby's manager explained that the club didn't intentionally try to deceive anyone and that they have since reviewed their processes to make sure something like this doesn't happen again. They have also put in place new measures to prevent similar mistakes in the future.

The game against Manchester United was a big win for Grimsby, and it was their first time beating a top-tier team in a competitive game. However, the fine is a reminder that even small mistakes can have consequences in sports.

It's worth noting that a similar mistake by another club, Barnsley, in 2023 resulted in them being kicked out of the FA Cup. Grimsby's punishment could have been much worse, but the governing body took into account that the mistake was not intentional.