This afternoon, A.J. Burnett signed a one-year deal with the Philadelphia Phillies. If you're looking for my reaction to the deal, you're not going to find it here. I've spent plenty of time discussing my thoughts on Burnett. To sum it all up once again, I think the Pirates rotation looks good, and I don't think Burnett was necessary to have a contending team. If you're looking for more detail, there are plenty of articles I've written on Burnett this off-season.

Today I want to focus on what could turn out to be a very interesting case study during the 2014 season: the impact of park factors and defense on a pitcher.

As we know, Burnett came to the Pirates after struggling with the Yankees for two years. Almost immediately he saw success with the Pirates. Part of that success came d...

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