This is an interesting question that I'd like to know the answer to as well. It doesn't have huge practical significance, but teams plan for contingencies, and it's fun to know what the plan is. Said it before and I'll say it again, Perez. Not surprisingly, Pérez exclaimed, 'Yes sir!' when asked if he also was the Brewers' emergency catcher behind Manny Piña and Jett Bandy, although he said he'd need to borrow one of their mitts if he had to fill in.