Jen Langosch just wrote on her blog that Ryan Doumit will re-join the Pirates a little early, making his return against Philadelphia tonight. She seems to think either Diaz or Jaramillo will be demoted to make room, though it could probably be Jeff Salazar or Luis Cruz just as easily.
Meanwhile, DK has a writeup of six Latin American signings the Pirates announced today. I don't know anything about any of these guys; I think they're pretty under the radar names. I mean, one is from Honduras, which sports Gerald Young as their only big leaguer. And no, no word on Sano yet.