Juan Cruz goes to the restricted list to take care of some personal matters at home. Doug Slaten will take his place on the roster.
Also from the article: "GM Neal Huntington revealed yesterday afternoon that he’s mulling a callup for [Jordy] Mercer in the near future."
UPDATE by Charlie: If the Pirates knew this was going to happen, maybe this is why Cruz pitched in yesterday's game. Slaten has an out clause that would have allowed him to leave this week, so this moves keeps him in the organization for now. He takes the roster spot vacated by Nate McLouth.