Moyes insists the former Crystal Palace ace would have to wait for his chance.
"Wilf is one of the boys we have not been able to have a look at so far," said Moyes.
"We always said we wanted him in. We needed him to see exactly what the level is like and the boy is doing well.
"But Premier League games are important. We have to win them.
"So whilst there will be some players who get the opportunities sooner rather than later some will have to wait their time because it is a fact you can only play 11."
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