In a little less than a week, rosters will expand around baseball, allowing teams to carry up to 40 guys on the active roster, being limited to anyone on the 40-man roster. For the Pittsburgh Pirates, this will almost certainly mean the arrival of some bullpen arms to help out, along with some extra bench players, and the return of Gregory Polanco.

Rosters expand on September 1st, at which point we should see a lot of moves (Polanco can't come back until the 2nd, when the Indianapolis season is over). As a preview of who should be coming up, I decided to break down the possibilities into sections, sorted by the likelihood of the players being called up.
Should Return to the Majors
Jaff Decker, Andrew Lambo, Michael Martinez, Brent Morel, Gregory Polanco, Casey Sadler, Tony Sanchez

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