re: i need a baseball expert for a sec regarding a balk

I was just about to post about the balk move we were taught in college ball. Its a little different than the one you said. Runners are generally keying off the front foot, and in most cases the heel. Your son should work on a variation of his quickest move to first. The only difference is he quickly picks up his heel before making his move to first. It has to be in one swift motion with his move to first. Even college umpires never called this