Thanks for all the replies so far. I need to take some recent video of him. I think the best thing to do would be to video a bullpen and then get some game video. It may take some time.
I don't think he's afraid to hit the batter. He hit three yesterday alone. I think he's trying to hard to be accurate. He's been struggling with opening his hips too early every since he started pitching, and it has been a bit worse than usual lately. Since he's left-handed, he tends to miss left of the plate, from his perspective, when he does this. The first batter he hit was left-handed, I'm going to assume opening up too early caused that one.
To his credit, he is now conscious of what he's doing wrong without being told. Sometimes when he attempts to correct this fault, he over-compensates and misses to the right of the plate. This could account for hitting both left and right-handed batters yesterday. He was an equal-opportunity employer.
Although he still gets in the most trouble with runners on. He seemed to think the majority of the hit batters yesterday were the result of looking at the runners and trying to pick up his target too late and never really saw where the ball went, which is kinda scary.