Offsite — MLB Gameday provides data files describing every pitch for most games, beginning in the 2007 season. The XML files are available from their Gameday server. You might enjoy Alan M. Nathan’s description of the gameday fields Mike Fast’s many useful articles John Walsh’s strike zone exploration at the Hardball Times. This diagram of pitch trajectory fields might be ...
Free Download — This dataset consists of a collection of Infoboxes from Wikipedia on the topic of National Pitch And Putt Team.