Jimsters requested mechanical breakdown

Jimster,

Contemplation phase.-

Very relaxed and confident looking, very good

Rocking back phase.

Steps to the side of the pitchers plate allowing for the pitching foot (ball side foot) to then turn almost paralleled to the pitchers plate with front of foot in dirt and heel on the pitchers plate. This is excellent but should be a little more inwardly pointed with the foot .While this helps eliminate “over early rotation” past the “field driveline” you still over rotate by 20 degrees with your shoulders and hips during your leg lift phase. This leg posture makes you produce a classic “splits drive” where in order to perform uses the thin and long “Tensor facia Latae” muscles the run from your hip to the outside of the knee, meaning you do not use the large muscles of the legs or buttocks to gain body momentum. This common motion while producing some forwards motion is actually not used as a Kinetic link during your actual forwards acceleration phase because it is early and completely stopped by the time even the rotational acceleration phase starts and is totally wasted like all conventional drop ins.

Leg lift phase.-

Your glove knee is lifted and taken back beyond lateral to the field driveline allowing continuation of “over early rotation” past the field driveline. None of these early techniques allow you to add anything later because you perform the conventional “splits drive “ that is not a part of the kinetic chain that pitches the ball later.

Drop in phase. –

You drop in and land with your glove side foot locked in by landing toes first, this perturbs your ability to firm up by extension of your knee when you would have performed your acceleration phase and perturbs your walking response to maximize your intent at the right time and allow you to use the large muscles in your leg like the Rectus Femoris muscle, to forwardly move his body toward home plate… It is much more efficient to land the way we all walk, trot and lightly run, heal to toe and firm up this land leg that will allow you to use rotation of your shoulders and hips during a longer portion of you acceleration phase and allow you to get your center of mass ahead of your glove foot better.
This splits drive technique has you use the muscles in your crotch to decelerate to a complete stop by using your Adductor Brevis muscle long before any kinetic chain starts.
None of the large muscles of your legs are used like when we all propel ourselves forwards thousands of times a day.

Humeral/forearm transition phase.-

This phase is critical to get right to pitch from length and start your forwards acceleration phase right when your glove foot stabilizes with plant that signals the walking response at the same time your at length.

Your Humerus (internal shoulder rotation maximally) and forearm (forearm joint pronation) are still inwardly rotated at glove side foot plant, meaning your arm is not ready to start the rotational acceleration phase so you as most have to add a phase (transition phase) to get this done long after your glove foot has planted. This causes intuitive looping back during the start of your “initial acceleration phase” and “forearm bounce” (the UCL degrader) just before your forwards acceleration phase starts, plus it causes intuitive supination of pitch types that degrade your elbow because of ballistic articulation hyper extension where your elbow fights to hinge.

At glove side foot plant you flex your elbow by contracting your bicep and Brachialis. This has your ball hand ahead of your elbow towards home plate instead of at length behind your elbow towards second base. This causes you to move the hand and ball backwards as you start your transition and rotational acceleration phase, unfortunately this negative math has to be overcome by redirection of this mass to even start your forwards acceleration phase. This mechanic does not allow the contraction of you triceps to extend your forearm because the biceps and Brachialis are already contracted, this is another break in the kinetic chain.

The rotational acceleration phase. –

This separated (from the forwards acceleration phase) phase caused by “grabbing” (flexed elbow) and “late forearm turnover” causes the head of the Humerus to travel around in the glenoid cavity, first forwards when the rotational acceleration start to the rim of the anterior labrum and then backwards to the posterior Labrum rim like a mortar and pestle causing glenoid ligament laxity and possible labrum fraying or tears. Laxity is what causes “dead arm”.

The forwards acceleration phase. –

On you this phase starts when your shoulder rotation is almost finished and your shoulders are almost lateral to the field driveline because of the “Looping” giving you a very short actual “forwards acceleration timeline” . In other words you do not pitch from length.

Release phase

Because you use the conventional approach, your release is with your elbow down and in a poor position to pronate the drive and release that looks like you are trying to perform. This means that when you contract the muscles that attach at the medial epicondyle you also contract the muscles at the lateral epicondyle giving you an isometric forearm drive and supinated drives and releases that we see very well in the curve and fastball video. They are fighting each other and this causes over stress in the flexors and extensors of your forearm and ballistic elbow crash that effects the hyaline cartilage between your epicondyle of your Humerus and the Ulna, this pinch of the Olecranon process and the olecranon fossa causes splits in the cartilage that later allows the osteoblasts (bone builders) of your elbow bone to grow spurs that later break off and become “loose impediments” (chips) within the elbow and severe inflammation the further you go.

Recovery phase

Because you lock your glove foot to the ground instead of rolling across heel to toe and then pushing also and then with your glove leg you over stress the Labrum in your hip, twist the knee in a very vulnerable poor bent position (cartilage and ligament tears) and bend your back (lower back degradation) by lifting your ball side leg way up in the air that has you decelerate your arm by driving it across your chest. This also leaves you in a particularly bad position to react to hard hit balls back at you.

I appreciate your attempt at video production, some of the best video I have ever seen, great job!!!

It would be great if you made the fastball video into a gif. file and numbered each frame and paused for a few seconds at critical points at the start of each phase and at release to be able to see what I have outlined for you and post it here to further discuss what you do.

It would be very nice if you had slow mo video from above to see an overhead acceleration graph that is produced, that explains much more what is happening and when. Nobody produces this and should to discuss mechanics with merit.

Later, Lon J. Fullmer
Saddleback Valley baseball

Lots of detail! Thanks for the response!