Morrison could play his first game for the team when they play in a friendly against Catalonia in Spain next month.
He has represented England at various youth levels as a Manchester United player but was never selected for the senior side.
Morrison, who was born in Manchester, gained Jamaican citizenship in 2018.
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!