Analyzing the Marlon Byrd trade

In sending prospect Dilson Herrera and a player to be named later to the Mets for Marlon Byrd and John Buck, the Pirates made a truly all-in move, acquiring a rental player to fill their right-field hole while giving up a true prospect, for the first time in probably two decades. Meanwhile, the Mets shed some parts they didn't need for one prospect we know and another player who I'm told will be a decent prospect.