Ok, I finally found time to review the videos. Here’s what I spotted:
(1) The initial side step at the start of the deliver creates a lot of unnecesary movement of your head and body - too much for my liking. I have my pitchers take a small step forward just enough to help them rotate and plant the pivot foot against the rubber.
(2) It appears you first look straight down, then down but out a few feet in front of you, and then at the target. This means your eyes are having to refocus 3 times during your delivery. Try to lock your eyes on your target from the get-go and leave them there.
(3) You have a big dip at the start of your stride and your torso leans back. This also creates unnecessary head movement.
(4) Your knee lift looks fine and you appear to lead with the hips.
(5) You plant on a fairly straight front leg.
(6) You don’t necessarily pull your glove to your side but it ends up at your side and just kind of flops around a bit.
(7) You have little to no delay between hip rotation and shoulder rotation.
(8) Your back foot lifts off the ground instead of dragging.
(9) Your release point is in back of your front foot - it should be 8"-12" in front of your foot, knee, chest and chin which should all be aligned vertically at release.
(10) Your camera is tilted (in the side view).
Most of these items are all related. By dropping the glove and not delaying your shoulder rotation, you don’t give yourself time to track forward and get your release point out front and you don’t achieve your maximum velocity. By planting on a (mostly) straight front leg, you also prevent your body from tracking forward which, in turn, means you aren’t going to get your back foot to drag. The straight front leg creates a “cartwheel” effect - your body flexes at the hips, the torso leans forward and your back foot lifts off the groung. I’d want the torso to remain more upright at release so your shoulders rotate around an upright spine. When you track your upright spine forward, your back foot will drag. Although we want the back foot to drag, it is not the goal - do not try to make your back foot drag. Think of it more as the result of doing the other things correctly.
So, what to do? Where to start?
First, minimize or eliminate the side step at the start of the delivery and lock the eyes on the target. Start with the knees bent a bit more to reduce the dip. These things will keep the eyes more level and get more of your movement going horizontally toward the target instead of sideways and up and down. They are easy to do - you just have to remember to make yourself do them until they become habit.
Then, you need to try to do all of this:
- try to plant on a more flexed (but firm) front knee
- get the upper arms into an opposite and equal position at foot strike
- leave the glove out front and bring the chest to it
- delay shoulder rotation as long as you can while tracking forward
If you can do these things, you should find that you will have a little more velocity, your release point will be closer to home, the consistency of your release point will increase, you will put less stress on your arm because you’ll be using more of your body to throw.