Lead-off Batter = On-Deck Batter?

[EsqUmp]

Originally Posted by CecilOne

The rule does say "single on-deck batter" as quoted; but is this OOO.

However, I think the on deck circle like the batter box and other things exist even if there is no visible line.

This is not over-officious at all. It is a safety concern and safety ought to be your first priority. Umpires need to enforce the rule without fault. On-deck circle exist for a reason. Team members shouldn't have to worry about when another on-deck batter may come out and swing illegally.

If you see it and let it go and someone gets hurt, good luck.