You’re looking very fluid and relaxed - excellent. To complete this motion with your shoulders adding to your upper movement, exchange your shoulders more, the pitching shoulder coming all the way and around, deliberately pointing to your target, with your glove shoulder followng suit - pointing away from your target.
Don’t forget the finishing touch - make sure your glove side elbow extends back, extending beyond the flush side of your back.
Finishing off like this will allow your shoulders to be " in the pitch", not an after thought. You’ll also start to feel more of your mid section muscles helping the cause too.
I’ve got to hand it to your Jimster, you’re taking it upon yourself to develop, to improve and stay healthy at the same time. This all takes a lot of time and dedication. It won’t pop up over night. Stay with it, you’re doing fine.
Thanks for the kind words. And you’re right that it doesn’t happen over night. There’s always that point where it finally ‘clicks’ but that’s over many, many, many attempts.
I’m must amazed that my arm external rotates now. Just a short time ago, I couldn’t get it go any further back than you can normal bend it. You can see evidence of that in older videos.
It will be more hard work to translate this arm action to my full pitching motion. But heck I could get my arm to bend almost 90 degrees more than it could before, I’m sure I can get it do it while I throw full speed.