Let's give merit we're it's due, personally I watched that game from start to finish, let's forget United are a top tier team for a second  and admit Grimsby looked like the team that needed it more and from the onset they pressured Utd more and justed looked more determined to get that first goal which they did...

Btw whatever rivalry happened some several decades ago seems to have been renewed, when I heard the commentors say United haven't won Grimsby before I knew United will be f@##&, and at this point clearly Amorim looks like his experiments aren't working even when he has the players...let him stop the nuisance of favourite players and field players by their strengths.