I wouldn't worry about protein or any supplements other than fish oil or possibly creatine for some power endurance benefits. At your age, you'll probably be in a great position for strength and size increases naturally. Just eat.
As far as WS4SB, I think it would be fine for off-season work, but in my opinion, the volume is fairly high for in-season work. Just focus on full Olympic squats, glute-ham raises, and split squats for a few high quality sets. Also, if you are going to lift on the same day you run, I'd do track work first.