If you’re a sabermetrics geek you’ll definitely want to check out Carson Sievert’s pitchRx package. You can scrape all PitchFX data since 2008, visualize strikezones, create interactive 3D pitch charts and a lot more. The below example pulls Jon Lester’s pitchFX data from May 4th, 2012 against the Baltimore Orioles and visualizes the locations of the pitches he threw as they crossed home plate.
I also used this library to scrape all of PitchFX data from 2008-2012 and am going to import it into a local database so I can query it quickly and easily. For a great introduction and overview of this library, check out Carson’s demo here: http://cpsievert.github.io/pitchRx/demo/.