[senior]

A good time to address this pain in the posterior would be during the pre-game with both managers. The subject of "trash talk" leads right into "verbal interference" and both Managers can understand where you stand on the issue.
I can live with "chatter" in the younger groups, but the shavers definitely need to grow out of it.
My suggestion to the puzzled looks is to watch an NCAA game or the College World Series and see how much chatter goes on.
If a team complains, I'll go to the other team's Manager and direct him to stop all comments once the Pitcher starts his motion. If chatter persists, strikes become balls until it ceases. Only once in the past season did I have to enforce this, and it took two calls to get his attention. From there on, real baseball was played, to the enjoyment of all.
It puzzles me how some Managers try to get an edge by "Bush League" tactics instead of coaching the kids on proper baseball fundamentals.