Minor league catching depth flourishing for Padres

At one time, the San Diego Padres farm system was the best in all of baseball. In recent years, A.J. Preller systematically traded players in the minors to upgrade the major league team. A few times, the Padres dealt very highly-touted catching prospects to get what they needed from another franchise via trade. Catching is a premium position, and generally, players who are behind the dish are coveted by teams. That is not a secret.