Wait, Run That By Me Again?

Jorge Posada's surgery-requiring injury, a procedure from which the recovery period is approximately six months will be delayed to "contribute" as DH and first baseman. Posada, on hitting: "It doesn't hurt when I hit, but it is restrictive, especially left-handed.."

If there's no chance of Jorge catching ever again until he has surgery, does delaying that surgery until as far out as November — which pushes return to action to May of 2009 — make sense to keep his "restricted" (and, this season, just slightly above average) bat occasionally in the lineup with limited field time at first? I don't get it.