Assistant boss Steve Davis told BBC Radio Stoke: "He's a young lad, he wants to do well, he's got a good physique and he can play a bit as well.
"If he can stay free of injuries, he can be a real asset for us."
Wayne Rooney has returned to Everton after 13 years at Manchester United.
Germany defender Antonio Rudiger has joined Chelsea from Roma on a five-year contract.
Wayne Rooney has returned to Everton after a record-breaking career at Manchester United.