Sources: The Rays and Mariners are finalizing a deal that would send C Mike Zunino and OF Guillermo Heredia to Tampa Bay for OF Mallex Smith. Still pending medicals, etc., so it's not official yet. @RyanDivish had deal first and @Ken_Rosenthal first mentioned Zunino to Rays.

— Jeff Passan (@JeffPassan) November 8, 2018