[quote=“djedmondo”]Well its something that I have been trying to fix for awhile, when I move my momentum over my leg it collapses and should be locked so I can bring my momentum straight over the top.
Watch at 23:01, when I drive my momentum over the top my leg is completely collapsed and should be locked out.[/quote]
The reason your leg collapses and your front foot twists in the dirt is because your center of gravity is moving in a direction to the glove side of the target you’re throwing to instead of towards the target. Your leg doesn’t have the strength to support your weight moving in a direction that is not offline from the position of your front leg. Some pitchers that do this will point the knee in the direction their weight is going while others twit the front foot after it plants (like you). So, backing up in your delivery, your weight gets moving to the glove side due partly to your postural shift during your delivery (head and spine tilting to the glove side) and partly to your stabilizing your glove outside your body (on the glove side).
One thing that can help reduce the postural shift is to move your starting position to the glove side of the rubber. And stabilizing the glove in front of your torso starts with getting the front arm to an “equal and opposite” position with the throwing arm meaning and being there as close to front foot plant as possible.
Also, I’m not sure what you mean when you say your leg should be “locked out”. You should be planting on a bent front leg, it should firm up and brace, and then as you release the ball and follow through it will straighten out.