Why do baseball players cover their mouths?

Why do baseball players cover their mouths? You don’t want anyone reading your lips. If you have anything you want to keep in that circle, you’ve got to cover your mouth.” When players bury their face in a glove while they talk — which is the rule, not the exception — they ensure that what’s said on pitcher’s mound, stays on pitcher’s mound.

You don’t want anyone reading your lips. If you have anything you want to keep in that circle, you’ve got to cover your mouth.” When players bury their face in a glove while they talk — which is the rule, not the exception — they ensure that what’s said on pitcher’s mound, stays on pitcher’s mound.