In looking at the rule book, Rule 9-7-4 states ..
A ball in player possession shal not be batted forward by a player of the team in possession. This would seem to describe a player in possession (the runner) batting the ball forward to a teammate. Like an illegal forward pass except it was an illegal bat. If this occurred beyond the neutral zone I would imagine this would be enforced as a spot foul. That would sure be a goofy looking play.
GH
