Our wildlife center, where I am curator, rescues MANY balls like the one pictured. Here are some pointers:
1) If possible, get the snake to a good herp vet to have him look it over. If that isn't possible, here are a few things that have worked well for us:
2) Keep the snake on newspaper for now (in fact, permanently; its still teh best substrate for snakes). Make sure the snake is kept in a well ventilated cage and the substrate is kept dry.
3) Make sure the snake has two hide areas; one on the warm side and one on the cool side. During treatment of sick ball pythons, we typically keep temps up a bit (82 cool side and 86-88 warm side with a basking area that reaches 90-92).
4) Those white "pock" marks look like old scars from this snake being fed live prey. These can lead to secondary infections if left untreated which is why getting the snake to a vet is important as this snake may need some antibiotics. We treat these wounds with Tricide/ampicillin and then apply Silvadene; these two work great.
5) keep stress to a minimum...NO HANDLING. Offer warmed frozen/thawed adult mice to start via forceps. We first offer food at night when bp's are most apt to accept food.
6) take things REAL SLOW. Recuperation can take months. The key right now is proper meds, proper thermal gradient, keeping substrate dry (but a good soak once a week and some every other day misting is beneficial), and keeping the snake safe and secure will go a long way towards recovery. Good luck.
Rob Carmichael, Curator
The Wildlife Discovery Center at Elawa Farm
City of Lake Forest, IL
Hi everyone,
He/she is a WC adult and has Ticks, probably mites, retained eye caps, pieces of stuck shed, and probably isn't feeding well. 
-Lauren 
