Little League Pitching Rules: Overhand vs. Underhand & Windmill

Question
Can a little league player pitch underhand and if so, is the windmill
style allowed (as opposed to stopping the arm in a vertical position
prior to the pitch)?

Answer
Steve,
I am not sure if their is a rule as to how a pitcher may pitch.  I have never see a player pitch like this or want to pitch like this.  I would recommend that the player throe the traditional overhand style.  I don't believe the under hand style would be effective when he gets older and is pitching from the 60ft 6in distance.

Thank You,
John Priest
Nokona Batman