Amalfitano is no stranger to the Premier League having spent last season on loan at West Bromwich Albion. Morgan made 31 appearances for the Baggies scoring four goals in the process.
Speaking about the move, he told the official site, “I've waited a long time, but I am very happy to have signed here. The Club wanted me a lot and for that I waited for West Ham and now I'm here.
"The manager explained to me how the team plays and how he needs me. I explained to him where I prefer as my position in his team. This is a new team with very good players with great experience of this league. I think everything can go well and I hope we have a good season.”