I may just update this post with the various moves we see over the next 24 hours.
As Charlie posted, it appears Pedro Ciriaco is on his way to Indianapolis. Others are sure to follow. It is unclear whether both Ronny Cedeno and Steve Pearce will be recalled for Friday's game, but at least one is certain to be. Also, as I have mentioned, when Jason Grilli is added to the 40 & 25-man rosters tomorrow two moves will have to be made. The most likely scenario is that Evan Meek is moved from the 15-day to 60-day DL. Meek was disabled on June 10. Since he is still in the strengthening phase of his rehab it would be virtually impossible for him to be back major league-ready by August 10. I would guess he is not back before rosters expand September 1.
In a bit of good news, Ryan Doumit will begin his rehab assignment with Bradenton today. I would think this puts him on track to be in Indianapolis as early as next Monday, and possibly with the Pirates when they play Philadelphia next Friday. That would be a quick timetable, but I think the Pirates will move him as quickly as possible if his ankle can handle the rigors of catching at least every other day.
Ross Ohlendorf will make his next rehab start with Altoona on Sunday. This is noteworthy because, barring a setback, Ohlendorf's rehab will end before September 1 at which point he will have to be added back to the 40-man roster and probably to the 25-man roster. This will call for some interesting decisions to be made before rosters expand.
UPDATE: Immediately after posting this the Pirates have announced that they have signed Jason Grilli. He will wear uniform No. 39. Evan Meek has been moved to the 60-day DL and his earliest reinstatement is August 7.
The team also announced that both Pedro Ciriaco and Josh Harrison have been optioned to Indianapolis. No word on Cedeno, Pearce or Leroux. The 40-man roster is full. The 25-man roster currently stands at 24.