As most of us know, the Pirates have stunk for a long, long time.
Since 1992, the Buccos have made mistake after mistake in the development, trading, drafting, and signing of free agent players. Every time a player starts to pan out, the Pirates trade him for an average of three prospects.
When you're lucky, one of those three pan out. Then you trade that guy for three more prospects and hope one of those pans out so you can start the vicious cycle again.
When you pan over this era, you see a few deals that have been good ones, not many, but a couple have worked out. This is my tracking of the one Pirate I believe has brought maximum value for his talents, Ricardo Rincon.