One of the big themes I've talked about with the Pittsburgh Pirates and their farm system has been the total lack of a third base prospect. Pedro Alvarez is a Scott Boras client, which means you can forget about a future extension, and pretty much wait for him to hit free agency following the 2016 season. And since the Pirates don't have an internal option, that's going to raise a question about who could be the starting third baseman in 2017.

A lot can happen between now and then. They could have a prospect break out in the minors. Just for perspective, Gregory Polanco is a breakout prospect expected to arrive in the majors in mid-2014. He broke out in West Virginia in 2012. By comparison, to get a guy on the same timeline to replace Alvarez, the Pirates would need a breakout player at...

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