Pena could be a potential upgrade at first base - MRHSfan, Flickr.comA large segment of the Pirates fan base, energized by the team’s competitive play, is eager to see the team trade for an impact bat before the July 31 trade deadline. Over the past few weeks, it has been difficult to turn on the radio without hearing a caller state that Neal Huntington should deal whatever prospects are necessary to acquire someone like Carlos Beltran or Hunter Pence. Despite the improved play, the Pirates lineup has been underwhelming, and a guy like that would be a clear upgrade. That being said, it is important to keep the expected impact of adding a big bat in perspective.

To do this, I am using ZiPS. ZiPS is a projection system created by Dan Szymborski, and it is constantly updated at FanGrap...

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