I can stand squarely behind this. I have seen (and at one time was guilty) of having the "football" mentality of playing through the pain. I have since been converted by competent pitching instructors that this is not ok. Playing with pain may be ok if you get whacked on the thigh with a pitch, but not so much with a sore arm or shoulder from incorrect repetitive motion.
I bust chops with the whole Hillhouse thing to get a rise out of some people, and because I watched parts of his videos and he seemed to me to be a bit arrogant. I'm sure he is a fine pitcher, and possibly a good person to lead a clinic on pitching. I just am not sold on the idea that he is the end all to pitching with all the right answers. Thats all.
Oh, and to stop the Hijacking, Cali has more quality players because we have 20 feet of snow on the ground