That's from more than just being wet around the head..... It looks like he got a lil too close to a burn pit. I'd be checking him over for mites/lice definitely. Nothing left of his crest/cushion. The rest of his feathers have that ragged, work look that can either come from a severe bug infestation or a really bad overcrowding situation.
I imagine this boy has had a rough life. With some time, a good bath and blowdry, treated for mites/lice and some good food, he will look like a different bird! Even his color will look much nicer when he fills out. He also may have just molted.
I can't really tell if he is a partridge, but he does have some partridge coloring.
There is nothing wrong with him...he'll be a wonderful pet for you. I'd love to see pics of him in a few months!!