The Pirates' transaction page shows that shortstop Pedro Florimon has been outrighted to AAA, meaning that he's cleared waivers. The Pirates designated Florimon for assignment when they chose to keep Andrew Lambo on the roster last Sunday. Florimon will head to Indianapolis. The Pirates lost another player who was designated for assignment, Stolmy Pimentel, when the Rangers claimed him off waivers.
Florimon makes more sense for the Pirates in AAA. He can't hit at all, but he's good defensively (the fact that he cleared waives despite his defensive ability shows just how little upside he has with the bat) and would make a reasonable fill-in if something bad happened to Jordy Mercer. With Justin Sellers injured, the team's shortstop depth is currently limited to Gustavo Nunez, who has little experience above AAA. The other utility infielder at Indianapolis, Steve Lombardozzi, has limited experience at short and don't have the range for the position.
UPDATE: Florimon was previously outrighted by the Twins, so he can decline the assignment to AAA. He hasn't yet decided whether to do so.