HR in Baseball - The Third Catcher

I can tell when the baseball announcers are bored when the conversation turns to "Well, if they take out the catcher here, and the backup gets hurt, what do they do next?" Rarely, if ever, have I seen a situation where this needs to be addressed by the manager of any team.

This year, the Yankees have Russell Martin and Gustavo Molina, as well as former catcher Jorge Posada on the roster. This gives the Yankees that "third" option in case the announcers start worrying again.

Where in your organization do you need to worry about having a "third catcher"? Are there succession plans in place in the event of an unexpected emergency? As much as I vomit in my mouth when the announcers go on and on about third catchers, they do have a point; there needs to be readiness, even if someone is only needed once a year to fill a role.