The Pirates recalled Bido from Triple-A Indianapolis on Saturday.
With Carmen Mlodzinski (elbow) headed for the injured list, Bido will come up from Triple-A to fill the open bullpen spot. Bido holds a 5.35 ERA and 1.46 WHIP through 37 innings in the majors this season and could end up serving as a bulk reliever behind Andre Jackson, who will make his first MLB start Saturday against the Reds but isn't expected to work deep into the contest.