Steven Ellis posted:
Yes, from all the video I've watched, the arm is always fully extended at release. The release points and arm angles, of course, are what's different here between different pitchers.
The reason for his post is due - more than likely, to the fact that professionals are train'd in a totally different mode than other ball players. Yes - their arms are fully extended ... and yes they do have release points and arm angles ...BUT... unlike the amateur pitcher(s) who FIRES at a release point and is rarely train'd to complete the entire pitching exerience with a TEMPO of complete and smooth exchanging of the glove shoulder (G) with pitching (P) shoulder... complimenting this exchange with support by the torso.. bending and leaning forward INTO THE PITCH.
Take a look at my expample below and you'll see just how important this process is. Basically, from the start of your delivery to its end .. there is energy that must be released TO THE BALL ... NOT TO YOUR ARM. I know this sounds like a play on words .. but it's anything but.
When I see a rookie or even a veteran pitcher cranking out heavy duty stuff .. and their arm/elbow/shoulder..etc is taking the brunt of the pitch, I let them go through their motions (delivery) at one third (1/3 ) game speed with a medium duty mason's hammer. At the point where the player feels the "tugging" of the weight as he brings his arm up and over, I'll instruct him to avoid this weight shifting and concentrate on a smoother more proportional delivery. After usually three days .. on average, the player will exibit a smoother .. less dramatic pitching arm compliment... and that's on all pitches. A simple start to this process by the way ... is to remember to .. BURY THE PITCHING SHOULDER INTO THE CATCHER. For those of you who make it to the upper college level(s), you'll hear that a lot.
So, arm extension and elbow stress are one of many subjects topical to poor upper body discipline(s).
Also, I know the above sounds confusing, and if further comments are asked for, I'll try to explain my example better.