A mouthpiece would be the most appropriate in lacrosse
You would use a open stance.
Rulon Gardner was the champion i believe if that is what you are asking.
Pathogens usually enter our bodies through the eyes, mouth, nose, or urogenital openings, or through wounds or bites that breach the skin barrier. Organisms can spread, or be transmitted, by several routes.
So i would say no, that is false?