David-
I was planning on having him do dumbbell work such as lunges, step ups, and suitcase squats. Do you have any other recommendations for exercises that can be done?
Eric-
When you refer to medball circuits do you mean a combination of throws or do you mean stuff like squats with a ball and push ups on a ball? I still do not know if plyos of any sort are possible I will find out when I work with him tomorrow, but I will keep up hill stuff in mind. He is in decent shape but there is always room for improvement there.