BTW, I stumbled onto one of these players. He was a DL who I renamed Frozen Yogurt. I've had him for 44 League games now and he regularly rates an 8, sometimes a 7. He has progressed from a 43 to a 47 AND gained an SA. I've been tempted to replace him and leave him on the bench because numbers-wise, he drags down my teams average rating. I think it would be dumb to do so, as he still outperforms fellow defenders who are several levels above him. Yes, he is number 32.
Now 10 days after my original post, Yogurt has cracked 50. That's 3 levels in 10 days without using a personal trainer.