Fractured Knuckle (Pinkie and Ring Finger on Right Hand)?

I just got out of my cast and my fingers have a sharp pain in the knuckle areas, my wrist is extremely sore too, its my senior year for basketball, and I want to finish off on a good note. What are some recommended exercises or stretches I can do to strengthen my knuckles. Im already doing the thing with the squeeze ball, anything else?