The Biomechanical Man wrote:coyote,
Your situation was different. You played Posey and used I-Rod as a sub. In the other situations described, Posey and the other injury-prone catcher were both starters (typically with Posey at 1B). In some situations, like mine and the Riggo one J-Pav described, it was a 3-way of Posey, a pure catcher, and a pure firstbaseman platooning two positions (1B & C).
Gotcha. You are braver than I am. As much as Posey (not unexpectedly) keeps getting injured for me, I fear I'd have a non-catcher catching a fair amount if I tried to play both my guys at once.
Rodgriguez doing simple backup, though, is working out pretty well.