"He doesn't have to be ready now. We need a long-term solution at closer. If we sign him to a two-year deal now, and he is solid by the end of this season, then we can work on extending him beyond 2014."
How can you possibly know he'll ever be ready to be a full-time closer? And you want to just pay him for a full season to do nothing?
How much you want to throw at him? Keep in mind he'll no doubt jump at the first offer.