In our program we have several pitchers who have a problem with blowing open their front side arm and landing with their lead leg open. I am looking for a drill(s) that correct both the lead arm and landing. I put tape down to show the landing and where they should be, but I want to correct the reason they land this way.
Also, whenever I try to tell a pitcher to keep their glove side closed, they either
A) don’t extend it (keep it tucked to their body) , or
B) it messes up their arm path ( bring it to far behind body)
Anyone have any drills they use to correct blowing open with arm and leg?