Ump:
Is that in the rule book somewhere?
My son got called for it once, in the worst possible circumstance. League championship game, he was on second. Down by one run, one out.
Grounder to short, he just runs, was at least six feet from the shortstop. Home ump calls interference, now it's two out man on first instead of first/third with one out. We ended up losing.
My son still talks about it, and it was three years ago.
The ump was a guy I've known forever, and I just saw him yesterday. If this is stated in the rule book, I'd like to show it to him so he doesn't do it again.