Luis Ayala, formerly of the Mets, is the most recent name to be tossed around as a potential set-up guy for Nathan. He'd come cheaper than Gagne would have and offers a bit less in upside than Gagne would.
Here is a story: http://blogs2.startribune.com/blogs/...e-ayala-crede/
Joe Crede is also mentioned, as is Jose Mijares.