The Mets selected Hunter's contract Monday.
Anthony DiComo of MLB.com reported Saturday that Hunter was informed he had clinched a spot in the Mets' Opening Day bullpen, but his appointment to the 40-man roster and 26-man active roster didn't become official until New York designated outfielder Darin Ruf for assignment in a corresponding move Monday. Hunter is projected to handle a middle-innings role for the Mets to begin the season.