Here's where I'm starting to get a little creative.
The Athletics received Josh Reddick in the Andrew Bailey deal and so far, he has exceeded what anyone thought was possible for him. He has displayed power that he hadn't displayed at any other point in his career, and the fact that he is doing it in Oakland, one of the toughest places to hit in the big leagues, proves that he is for real. Put him at right in PNC, and his homer totals have the potential to rise even more.
In return for the young, controllable slugger, the A's would receive Luis Heredia, the 4th best pitcher in the Pirates' system behind Cole, Taillon and Appel if he signs. Heredia at just 17 years of age is progressing through the minor leagues and could legitimately compete for a rotation spot by the time he is 20.
In addition to Heredia, the centerpiece of the deal, the A's would receive Jose Tabata, who just doesn't seem to fit in with the Pirates. Yet he is still young and displays his potential on occasions such as Monday against the Phillies where he crushed an opposite field home run.
Once he figures out a swing that enables him to pull the ball hard to left as well as go the opposite way (his go-to), he will become a very good starting outfielder, capable of a 20-20 season.
Finally, the A's would also receive a nice bullpen piece in Bryan Morris, the last remaining player from the Jason Bay deal. Morris has been pitching well since he was converted to a reliever and was just recently briefly promoted for the big leagues for last weekend's series vs. the Tigers.