The Mets and Diamondbacks are bidding for Nationals closer Chad Cordero, whose name keeps popping up in trade talks as the 4 p.m. EDT nonwaiver deadline approaches. The Mets offered fine pitching prospect Phil Humber for Cordero but have been firm to this point that they will not surrender any of their top four prospects: outfielders Carlos Gomez, Fernando Martinez and Lastings Milledge, and pitcher Mike Pelfrey. Cordero was originally drafted by Mets GM Omar Minaya. The Mets tried to get Eric Gagne earlier but appear to be targeting Cordero now.