Manchester United have refused the chance to force their way back into the Carabao Cup, despite evidence that Grimsby Town fielded a player who had registration issues in their second-round tie. The League Two side, who dumped United out in a dramatic penalty shoot-out, were found guilty of breaching EFL rules but escaped with nothing more than a fine.Man Utd reject lifeline after cup chaosGrimsby fined for fielding an ineligible playerRed Devils won’t appealFollow GOAL on WhatsApp! 🟢📱Recommended external contentVideoWe need your consent to show you content our Editorial team embedded from Video. You can toggle this (and all other embeds from Video across goal.com) on with one click only and deactivate as well.Always display Video contentI confirm that I would like to see external content. Personal identifiable data could be transferred to Third parties. Read more about it in our privacy policy.