Everton boss David Moyes insists teenager James Vaughan's career is not threatened by yet another serious knee injury.
The young striker has suffered a catalogue of injuries and operations on his knees over the last few years, and there has been speculation his latest trip to Colorado spells a threat to his career as he prepares for a cartilage operation, to be peformed by Dr Richard Steadman.
Moyes said: "I do not fear for the boy's career. But it is always a shame when a youngster has the problems he has had."
He added: "He is a terrific lad with a great attitude and that is why I am confident he will come back and have a good career.
"We want him to have a good career from the game and we will do the right thing by him to get the best treatment.
"I'm really disappointed for the boy, we were just beginning to get him back into training and he was much better than he has been for a while.
"He'd been working with us for a few months. He then twisted his knee in training and initially we didn't think too much of it because it didn't look bad, but then it was discovered he had damaged his cartilage."
He added: "He has had a lot of trouble with the left knee, now it is the right. I just feel he needs a bit of good fortune, he has been so unlucky in such a short time.
"He will now have an operation in Colorado in the next few days and I just hope that it will be the end of his problems."
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