The Zach Duke era with the Pittsburgh Pirates is officially over.  After designating the left handed starter for assignment on Friday, the Pirates traded Duke to the Arizona Diamondbacks for a player to be named later.

According to Nick Piecoro of The Arizona Republic, the Diamondbacks aren't likely to tender an arbitration offer to Duke, and basically traded for him to try and negotiate a deal prior to the non-tender deadline.  Piecoro had this to say about the PTBNL on Twitter:
The PTBNL isn’t one of the Dbacks better prospects. Can’t name him now because rosters are frozen pre-Rule 5 draft, I'm told.
Duke has been traded to the Arizona Diamondbacks for a PTBNL.

It could be that the player to be named later will come from a group of players eligible for the Rule 5 draft, which me...

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