Djedmondo, you mentioned that you need to start throwing more with your shoulder and not so much with the arm—and therein lies a major problem. Most pitchers run into trouble when they throw with just the arm or the shoulder or both, when what they really need to do is get the whole body into the action. This is what I call “The Secret”—something I learned a long time ago when I was really getting into the game.
I learned this when I went to the games at Yankee Stadium (the original ballpark) and watched the Yanks’ Big Three pitching rotation. They were all doing the same thing: they were driving off the lower half of the body, using the legs, the hips and the torso in one continuous (and, it seemed to me, seamless) motion, and this was how they were generating the power behind their pitches—not to mention throwing harder and faster because they were taking a lot of pressure off the arm and the shoulder. Even Ed Lopat, who was by no means a fireballer, was doing this. The arm and the shoulder were just going along for the ride, which made for a smoother delivery and at the same time more snap and sizzle. I saw how they were doing this, and I made a mental note of it and started working on it on my own.
As I practiced this essential—and believe me, it is essential—aspect of good mechanics, I found myself doing the same thing they were, and even though I was strictly a finesse pitcher with not much on speed I too was throwing harder with less effort. I was a natural sidearmer, and when I picked up the crossfire—this is a move that works only with the sidearm delivery—I found it to be an absolutely lethal addition to my arsenal. I continued to practice and refine this get-the-whole-body-involved motion, and it served me very well for some twenty years.
There are some drills and exercises you can do, to be found on this website; one of the best is the so-called “Hershiser” drill which focuses on getting the hips fully involved—and in the process, it will greatly help your posture. And I would strongly advise you to do some throwing every day, whether it be just playing catch or doing a full bullpen session—this will keep your arm and shoulder loose and flexible and help you avoid injuries. All you need is a good catcher with a mitt and maybe a mask.
Hope this helps. 8) :baseballpitcher: