The Mariners and Rays appear close to finalizing a trade that would send catcher Mike Zunino and outfielder Guillermo Heredia to Tampa Bay for Rays outfielder Mallex Smith. The framework of the deal, which is expected to involve two low-level Minor Leaguers in addition to the three aforementioned players, has been agreed to, sources told MLB.com’s Greg Johns and MLB Network insider Ken Rosenthal. But the deal won’t be finalized until medical files are reviewed, and neither club has confirmed the agreement, which was first reported by Ryan Divish of the Seattle Times.