Getty ESPN's Dan Graziano included Pittsburgh Steelers wide receiver D.K. Metcalf on a list of potential offseason trade candidates. Less than a month away from the NFL Draft, which will take place in the city of Pittsburgh, the  Steelers could still be looking to address a position or two via free agency. While the franchise currently holds 12 total picks in the upcoming draft, including seven within the first four rounds, adding another experienced NFL player could not hurt at all. In fact,