There have been a couple updates made to a couple of the stats on the site and some new data for 2010 added.
1. Total Zone and Total Zone with Location Data (TZL) are now available for the 2010 season. They’re in all the fielding sections, leaderboards, etc….
2. wRC+ has been updated to fix an issue with the league baselines. As a result for 2010, all NL players are now -4.01 and all AL players are -2.58. This will have some effect on all seasons with a similar uniform effect for AL and NL players. Big thanks to Kincaid for alerting us to the issue.
3. Pitcher BABIP has been updated to use TBF instead of estimating AB through IP. This has been a long time point of contention with our BABIP calculation. For years where TBF is unavailable, the old method is still being used (years prior to 1916 and most projection systems). As a result, BABIP’s for pitchers will show as lower than they were, but the baseline is also lower. The ordering of players remains extremely similar and the correlation between estimating AB’s using IP*2.82 and using TBF is about .99. The BABIP formula we are currently using for pitchers is (H – HR) / (TBF – BB – HBP – HR – SO).