The biggest and least surprising move is the Pirates finally let Garrett Jones go. Slightly more surprising was that Kyle McPherson was also designated for assignment.
Of course the most surprising (not because of impact but just because trades are tough to predict) is that Alex Dickerson has been dealt to the Padres for Jaff Decker (oh the first name might cause Foo some issues) and Miles Mikolas. Here are a few stories about it.
NBC Sports
Pirates Prospects
WHYGAVS
Bucs Dugout
And of course Player Pages:
Jaff Decker
Miles Mikolas