I saw there was a previous thread on this but this situation was a bit different so I thought I would ask. There was a play at the plate. Ball came in low and catcher missed. The on-deck batter, from the 3rd base side circle, had moved closer to the play to guide the runner. The ball ends up hitting the bat she was holding, and flies over the head of the pitcher backing up, allowing another run to score and runner on first to advance. I suspect that the runner on 3rd would not have scored without the ball hitting the bat, but just a guess. Is this interference?