McFadden joined Everton on a free transfer earlier this week and signed a deal that will keep him at the club at least until the end of the season.
“He has had a bad knee injury which kept him out for over a year,” said Moyes.
“I wouldn’t be expecting to see him playing too soon but he has got his first 45 minutes of football under his belt this week for the reserves.
“He has been out for a long time but he has looked good in training and we will try to get him back quickly. Hopefully it won’t be too long because we want him around the squad.
“He is here for the season and if he does well we will look at things again.
“This is a deal that helps both parties. He has looked good in training and he has matured.”
