The Reds will begin the season with just two catchers, whether Mesoraco is ready for Opening Day or not.
This doesn't necessarily mean Mesoraco will not be ready -- only that they won't carry a third catcher and limit Mesoraco's duties to pinch-hitting and spot starting behind the plate early on. If he's not ready to split the catching duties 50-50 right away, Mesoraco will begin the year on the DL.