According to Dan Graziano of the Newark Star-Ledger:
The Tigers, desperate for a pitcher at the back end of their bullpen, are trying to have serious discussions with Oakland about closer Huston Street. But so far, the A’s have not even decided if they want to trade Street. And if they do, they’re likely to ask more than the Tigers have to offer.
We talked about Street a couple days ago. Jon Heyman believed the asking price would be huge; Susan Slusser suggested the A’s might wait until midseason. The Tigers aren’t a great fit given their farm system.