The Gateshead-born striker has had all loan moves blocked as new manager Kevin Keegan says he wants 'all hands on deck'.
The Next Player To Wear The Famous No 9?
Irvine: "Andy's got massive potential, and I've said that to him.
"At the moment, he might be a young lad who doesn't realise what he's got.
"He's a fantastic shape and size, and has a terrific touch with both feet. He strikes the ball really well, and is wonderful in the air.
"But he needs to properly focus on football. He needs to fully concentrate on being the best he can be.
"I've had a chat with him, and wished him well. I told him how much potential I think he has, and I hope he uses a little bit of that advice.
"I said to him 'you can become a great No 9 for Newcastle'. He knows all about the No 9 jersey, and his target should be to become a No 9 for Newcastle.
"I didn't play Andy as often as he would have liked, but there's a reason for that. I had six strikers when I walked into the job, and I had to make some changes.
"I knew in this transfer window it was almost certain I would lose Andy and Paul Gallagher, and I had to know who I had signed for the club.
"He was a victim of those circumstances.
"It's been a test for him. You look around the Championship, and there aren't many young players playing on a regular basis.
"It's a big ask. People think players playing reserve team football can go and play anywhere else, but it's not as easy as that. You must be an exceptional talent."