Mets sign K-Rod: Now who should they get to complement the bullpen?

They need to go out and get a closer-like set up man. K-Rod descrease velocity, sitting at 91.8 mph on average is way down from 2006. Something is up and don't hand me his excuse of oh I don't like to throw hard anymore, I can but i choose not to. Thats the biggest piece of BS and why he had to settle for half of what he wanted. If I'm the mets, I trade for Street and Daniel Cabrera or Edwin Jackson and make them RPs. So when K-Rod goes down this year, they have a back up plan.