Today Baseball America released their top 20 prospects from the 2012 GCL season, which was the first league they've covered that had a Pirates affiliate. Over the next few weeks they'll cover every league that featured a Pirates minor league affiliate, which will give us a chance to see where the minor leaguers stack up compared to other teams. We've also been running a lot of season ending reports over the past few weeks, not only with the team recaps and top prospects, but with some evaluations like the 2009 draft class as one example.

With all of these year-ending reports coming out, it's important to keep some perspective. The most important thing to remember with prospects is that evaluations change. They can change in as little as a few months, or they can take a longer period of ...

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